Volume Numbers 1-4

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1 REPUBLIC OF SOUTH AFRICA THE ONDERSTEPOORT JOURNAL OF VETERINARY RESEARCH 1983 Numbers 1-4 SUBJECT INDEX Abyssinian cats Biochemical studies on a lysosomal storage disease in Abyssinian cats A. LUCIA LANGE, J. M. M. BROWN and CHAR- LOTTE C. MAREE Acarina Notes on African Haemaphysalis ticks. XV. H. (Rhipistoma) norvali sp. n., a hedgehog parasite of the H. (R.) spinulosa group in Zimbabwe (Acarina: Ixodidae). H. HOOGSTRAAL and HILDA Y. W ASSEF... storage prior to organophosphate testing. A. M. SPICKETT and A. J. NARI HENRIOUD Actinobacillus actinomycetem comitans The usefulness of the API 20 E classification system in the identification of Actinobacillus actinomycetem comitans, Actinobacillus seminis and Pasteurella haemolytica. J. A. ERASMUS Actinobacillus seminis The usefulness of the API 20 E classification system in the identification of Actinobacillus actinomycetem comitans, Actinobacillus seminis and Pasteurella haemolytica. J. A. ERASMUS: African horsesickness A morphological study of the lesions of African horsesickness. S. J. NEWS HOLME Aluminium phosphate C. M. CAMERON, B. J. VAN BIUON, W. J. S. BOTHA and P. C. KNOETZE Amblyomma hebraeum A bioassay technique for the pheromone emitted by Amblyomma hebraeum males. Y. RECHA V Anaplasma centrale Infectivity virulence and immunogenicity of Anaplasma centrale live blood vaccine. F. T. POTGIETER and L. VAN RENS- BURG Angora goats and L. PROZESKY API 20 E classification system The usefulness of the API 20 E classification system in the identification of Actinobacillus actinomycetem comitans. Actinobacillus seminis and Pasteurella haemolytica. J. A. ERASMUS Armyworm Intoxication of cattle on kikuyu grass following army worm (Spodoptera exempta) invasion. S. J. NEWSHOLME, T. S. KELLERMAN, G. C. A. VANDER WESTHUIZEN and J. T. SOLEY Arthropods The prevalence of helminth and arthropod parasites of warthog, Phacochoerus aethiopicus, in South West Africa/Namibia. I. G. HORAK, H. C. BIGGS, TAMMY S. HANSSEN and ROSE E. HANSSEN Some helminth and arthropod parasites of the grey duiker Sylvicapra grimmia. J. BOOMKER, W. H. DU PLESSIS and ELIZABETH A. BOOMKER (Connochaetes taurinus and Connochaetes gnou). I. G. HORAK, V. DEVOS and MOIRA R. BROWN Artificial infection and L. PROZESKY Asaemia axillaris axillaris (Thunb.) Harv. ex Jackson. J. A. W. COETZER and T. BERGH Asteraceae Photosensitivity in South Africa. III. Ovine hepatogenous photosensitivity caused by the plant Athanasia trifurcata L. (Asteraceae). T. S. KELLERMAN, J. A. W. COETZER, D. J. SCHNEIDER and WILHELMINA G. WELMAN Athanasia trifurcata Photosensitivity in South Africa. Ill. Ovine hepatogenous photosensitivity caused by the plant Athanasia trifurcata L. (Asteraceae)T. S. KELLERMAN, J. A. W. COETZER, D. J. SCHNEIDER and WILHELMINA G. WELMAN Babesia bigemina Serological response of cattle to infection with Babesia bigemina and Babesia bovis in Southern Africa. R. BESSENGER and J. H. SCHOEMAN Babesia bovis Serological response of cattle to infection with Babesia bigemina and Babesia bovis in Southern Africa. R. BESSENGER and J. H. SCHOEMAN Bacteria Retardation of wool growth in Merino sheep caused by bacteria. B. C. JANSEN and MARIANNA HAYES The epidemiology of bacterial infection of the genitalia in rams. B. C. JANSEN Bioassay technique A bioassay technique for the pheromone emitted by Amblyomma hebraeum males. Y. RECHAV

2 Biochemical studi'!s Biochemical studies on a lysosomal storage disease in Abyssinian cats. A. LUCIA LANGE, J. M. M. BROWN and CHAR- LOTTE C. MAREE.... Black wildebeest (Connochaetes taurinus and Connochaetes gnou). I. G. HORAK, V. DEVOS and MOIRA R. BROWN.... Blue wildebeest (Connochaetes taurinus and Connochaetes gnou). I. G. HORAK, V. DEVOS and MOIRA R. BROWN.... Bone phosphate levels Failure of bone phosphorus levels to indicate dietary intake of phosphorus by sheep. P. C. BELONJE and A. VAN DEN BERG Bontebok Haemonchus contortus from the vaal ribbok, Pelea capreolus, and the bontebok, Damaliscus dorcas dorcas, in the Bontebok National Park. J. BOOMKER, /.G. HORAK, LYNDAM. GIBBONS andv. DEVOS.... Boophilus microplus storage prior to organophosphate testing. A. M. SPICKETT and A. J. NARI HENRIOUD.... Bovine babesiosis The effect of tick control on the epidemiology of bovine babesiosis. A. J. DEVOS and F. T. POTGIETER.... Bovine milk The application of numerical taxonomy in the classification of staphylococci from bovine mille J. A. ERASMUS Bufadienolides ERASMUS and J. PROCOS The experimental production of krimpsiekte in sheep with Tylecodon grandiflorus (Burm. F.) Toelken and some of its bufadienolides, L. A. P. ANDERSON, J. P. J. JOUBERT, L. PROZESKY, T. S. KELLERMAN, R. ANITRA SCHULTZ, J. PROCOS and PHILLIPP AM. OLIVIER Burchell's zebra KRECEK Canine babesiosis Treatment and thrombocyte levels in experimentally induced canine ehrlichiosis and canine babesiosis. J. VAN HEERDEN, F. REYERS and C. G. STEW ART..... Canine ehrlichiosis Treatment and thrombocyte levels in experimentally induced canine ehrlichiosis and canine babesiosis. J. VAN HEERDEN, F. REYERS and C. G. STEW ART Cardiac glycoside poisoning ERASMUS and J. PROCOS.... Cats Tumours occurring in the cat. STELLA S. BASTIANELLO..... Cattle Chemotherapy of Theileria parva lawrencei infections in cattle with halofuginone. A. J. DEVOS and J. A. ROOS.... Serological response of cattle to infection with Babesia bigemina and Babesia bovis in Southern Africa. R. BESS ENGER and J. H. SCHOEMAN Intoxication of cattle on kikuyu grass following army worm (Spodoptera exempta) invasion. S. J. NEWSHOLME, T. S. KELLERMAN, G. C. A. VANDER WESTHUIZEN andj. T. SOLEY.... Characterization Isolation and preliminary characterization of the jaagsiekte retrovirus (JSRV). D. W. VERWOERD, ANNA-LISE PAYNE, D. F. YORK and M. S. MYER.... Chemotherapy Chemotherapy of Theileria parva lawrencei infections in cattle with halofuginone. A. J. DEVOS and J. A. ROOS Chronic obstructive pulmonary disease and theqrs complex. A. LITTLEJOHN, C. BUTTON and FELICITY BOWLES.... Cold storage storage prior to organophosphate testing. A. M. SPICKETT and A. J. NARI HENRIOUD.... Connochaetes gnou (Connochaetes taurinus and Connochaetes gnou). I. G. HORAK, V. DEVOS and MOIRA R. BROWN.... Connochaetes taurinus (Connochaetes taurinus and Connochaetes gnou). I. G. HORAK, V. DEVOS and MOIRA R. BROWN..... Cyclicostephanus longiconus Studies on the parasites of zebra. II. Cyclicostephanus longiconus n. sp. (Nematoda: Strongylidae) from the mountain zebra, Equus zebra hartmannae (Matschie, 1898). ROSINA C. SCIALDO-KRECEK.... Damaliscus dorcas dorcas Haemonchus contortus from the vaal ribbok, Pelea capreolus, and the bontebok, Damaliscus dorcas dorcas, in the Bontebok National Park. J. BOOMKER,l. G. HORAK, LYNDAM. GIBBONS and V. DEVOS

3 Diptera The influence of water-level fluctuation on the drift of Simulium chutteri Lewis, 1965 (Diptera, Nematocera) in the Orange River, South Africa. M. CAR Dogs A survey on neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. VI. Tumours occurring in dogs. STELLA S. BASTIANELLO Domestic animals A survey of neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. lll. Tumours occurring in pigs and goats. STELLA S. BASTIANELLO A survey on neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. IV. Tumours occurring in equidae. STELLA S. BASTIANELLO Tumours occurring in the cat. STELLA S. BASTIANELLO A survey on neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. VI. Tumours occurring in dogs. STELLA S. BASTIANELLO (Connochnetes taurinus and Connochnetes gnou). I. G. HORAK, V. DEVOS and MOIRA R. BROWN.... Drummond test storage prior to organophosphate testing. A. M. SPICKETT and A. J. NARI HENRIOUD Epidemiology The effect oftick control on the epidemiology of bovine babesiosis. A. J. DEVOS and F. T. POTGIETER The epidemiology of bacterial infection of the genitalia in rams. B. C. JANSEN Equidae A survey on neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. IV. Tumours occurring in equidae. STELLA S. BASTIANELLO Equus zebra hartmannae Studies on the parasites of zebra. II. Cyclicostephnnus longiconus n. sp. (Nematoda: Strongylidae) from the mountain zebra, Equus zebra hnrtmannae (Matschie, 1898). ROSINA C. SCIALDO-KRECEK Facial eczema facial eczema and geeldikkop (Tribulosis avis), with special reference to their pathogenesis. J. A. W. COETZER, T. S. KELLERMAN, W. SADLER and G. F. BATH Geeldikkop facial eczema and geeldikkop (Tribulosis avis), with special reference to their pathogenesis. J. A. W. COETZER, T. S. KELLERMAN, W. SADLER and G. F. BATH Genitalia The epidemiology of bacterial infection of the genitalia in rams. B. C. JANSEN Genital infection The reaction of ovine neutrophils to Histophilus avis in relation to genital infection of rams. B. C. JANSEN, MARIANNA HAYES and P. C. KNOETZE Greyduiker Some helminth and arthropod parasites of the grey duiker Sylvicapra grimmia. J. BOOMKER, W. H. DU PLESSIS and ELIZABETH A. BOOMKER Goats A survey of neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. III. Tumours occurring in pigs and goats. STELLA S. BASTIANELLO Haemaphysalis Notes on African Haemaphysalis ticks. XV. H. (Rhipistoma) norvali sp. n., a hedgehog parasite of the H. (R.) spinulosa group in Zimbabwe (Acarina: Ixodidae). H. HOOGSTRAAL and HILDA Y. W ASSEF Haemaphysalis (Rhipistoma) norvali Notes on African Haemaphysalis ticks. XV. H. (Rhipistoma) norvali sp. n., a hedgehog parasite of the H. (R. ) spinulosa group in Zimbabwe (Acarina: Ixodidae). H. HOOGSTRAAL and HILDA Y. WASSEF Haemaphysalis (Rhipistoma) spinulosa Notes on African Haemaphysalis ticks. XV. H. (Rhipistoma) norvali sp. n., a hedgehog parasite of the H. (R.) spinulosa group in Zimbabwe (Acarina: Ixodidae). H. HOOGSTRAAL and HILDA Y. W ASSEF Haematobia meridiana Bovine skin lesions of possible filarial origin associated with heavy hornfly infestations (Haematobia meridiana). S. J. NEWSHOLME, ANNAJ. M. VERSTERandJ. C. JACOBS Haemonchus contortus Haemonchus contortus from the vaal ribbok, Pelea capreo/us, and the bontebok, Damaliscus dorcas dorcas, in the Bontebok National Park. J. BOOMKER,l. G. HORAK, LYNDA M. GIBBONS and V. DEVOS Halofuginone Chemotherapy of Theileria parva lawrencei infections in cattle with halofuginone. A. J. DEVOS and J. A. ROOS Heartwater and L. PROZESKY Helminths The prevalence of helminth and arthropod parasites of warthog, Phncochoerus aethiopicus, in South West Africa!Namibia. I. G. HORAK, H. C. BIGGS, TAMMY S. HANSSEN and ROSE E. HANSSEN Some helminth and arthropod parasites of the grey duiker Sylvicapra grimmia. J. BOOMKER, W. H. DU PLESSIS and ELIZABETH A. BOOMKER (Connochnetes taurinus and Connochnetes gnou). I. G. HORAK, V. DEVOS and MOIRA R. BROWN

4 Heterobilharzia americana Sc~~~r~ ~lc~tsci~~~illc1fihe.. t~~~~.e~~~ l. ~u.~~~~.. ~.f. ~~~~r~~il~.~~i~.. a~~r~~a.rlil..(~re~.a~~~~~. ~c~i~tos~~~~~d.~~): Histophilus ovis The reaction of ovine neutrophils to Histophilus avis in relation to genital infection of rams. B. C. JANSEN, MARIANNA HAYES and P. C. KNOETZE Homeria glauca Some physiopathological features of experimental Home ria glauca.{wood & Evans) N. E. Br. poisoning in Merino sheep. C. BUTTON, F. REYERS, D. G. A. MELTZER, MARIAS. G. MULDERSandVALERlEM. KILLEEN.... Hornfly Bovine skin lesions of possible filarial origin associated with heavy hornfly infestations (Haematobia meridiaflfl). S. J. NEWSHOLME, ANNAJ. M. VERSTERandJ. C. JACOBS Horses and the QRS complex. A. LITTLEJOHN, C. BUTTON and FELICITY BOWLES..... Immunity and L. PROZESKY C. M. CAMERON, B. J. VAN BIUON, W. J. S. BOTHA and P. C. KNOETZE.... lmmunogenicity Infectivity virulence and immunogenicity of Aflflplasma centrale live blood vaccine. F. T. POTGIETER and L. VAN RENS- BURG Infectivity virulence Infectivity virulence and immunogenicity of AfUlplasma centrale live blood vaccine. F. T. POTGIETER and L. VAN RENS- BURG Ixodidae Clarification of the status of Rhipicephalus kochi Donitz, 1905 (Ixodoidea; Ixodidae). C. M. CLIFFORD, JANE B. WALKER and J. E. KEIRANS Notes on African Haemaphysalis ticks. XV. H. (Rhipistoma) norvali sp. n., a hedgehog parasite of the H. (R.) spinulosa group in Zimbabwe (Acarina: Ixodidae). H. HOOGSTRAAL and HILDA Y. W ASSEF storage prior to organophosphate testing. A. M. SPICKETT and A. J. NARl HENRlOUD Ixodoidea Clarification of the status of Rhipicephalus kochi D6nitz, 1905 (Ixodoidea; Ixodidae). C. M. CLIFFORD, JANE B. WALKER and J. E. KEIRANS Jaagsiekte retrovirus Isolation and preliminary characterization of the jaagsiekte retrovirus (JSRV). D. W. VERWOERD, ANNA-LISE PAYNE, D. F. YORKandM. S. MYER The morphology and morphogenesis of jaagsiekte retrovirus (JSRV). ANNA-LISE PAYNE, D. W. VERWOERD and HE- LEN M. GARNETT Kalanchoe lanceolata ERASMUS and J. PROCOS Kikuyu grass Intoxication of cattle on kikuyu grass following army worm (Spodoptera exempta) invasion. S. J. NEWSHOLME, T. S. KELLERMAN, G. C. A. VANDER WESTHUIZEN and J. T. SOLEY Krimpsiekte ERASMUS and J. PROCOS The experimental production of krimpsiekte in sheep with Tylecodon grandiflorus (Burm. F.) Toelken and some of its bufadienolides. L. A. P. ANDERSON, J. P. J. JOUBERT, L. PROZESKY, T. S. KELLERMAN, R. ANITRA SCHULTZ, J. PROCOS and PHILLIPP AM. OLIVIER..... Kruger National Park KRECEK Lambs C. M. CAMERON, B. J. VANBIUON, W. J. S. BOTHAandP. C. KNOETZE..... Large ruminants The ixodid tick burdens of various large ruminant species in South African nature reserves. I. G. HORAK, F. T. POT- GIETER,JANEB. WALKER, V. DEVOSandJ. BOOMKER Lesions A morphological study of the lesions of African horsesickness. S. J. NEWSHOLME Live blood vaccine Infectivity virulence and immunogenicity of Aflflplasma centrale live blood vaccine. F. T. POTGIETER and L. VAN RENS- BURG Liver axillaris (Thunb.) Harv. ex Jackson J. A. W. COETZER and T. BERGH Lysosomal storage disease Biochemical studies on a lysosomal storage disease in Abyssinian cats. A. LUCIA LANGE, J. M. M. BROWN and CHAR- LOTTE C. MAREE

5 Morphogenesis Th~EL~Wh~l~&'~~:.~~.~~.~~~.is.. ~.f j.aa~s~e~~. re.t~.o~.~~. ~~.~~~~--.. ~~.-.~~~~. ~ ~ ~~:.. ~.. ~ :.. :.~~.~?.~.~.. ~~~ Morphology A morphological study of the lesions of African horsesickness. S. J. NEWSHOLME The morphology and morphogenesis of jaagsiekte retrovirus (JSRV). ANNA-LISE PAYNE, D. W. VERWOERD and HELEN M. GARNETT Mountain zebra Studies on the parasites of zebras. Ill. Nematodes of the mountain zebra from the farm " Kelpie" and the Namib-Naukluft Park, South West Africa/Namibia. ROSINA C. SCIALDO-KRECEK, R. K. REINECKE and H. C. BIGGS... Nature reserves The ixodid tick burdens of various large ruminant species in South African nature reserves. I. G. HORAK, F. T. POT- GIETER, JANE B. WALKER, V. DEVOS and J. BOOMKER Nematocera The influence of water-level fluctuation on the drift of Simulium chutteri Lewis, 1965 (Diptera, Nematocera) in the Orange River, South Africa. M. CAR Nematodes KRECEK Studies on the parasites of zebra. II. Cyclicosteplu.mus /ongiconus n. sp. (Nematoda: Strongylidae) from the mountain zebra, Equus zebra hartmannae (Matschie, 1898). ROSINA C. SCIALDO-KRECEK Studies on the parasites of zebras. Ill. Nematodes of the mountain zebra from the farm " Kelpie" and the Namib-Naukluft Park, South West Africa/Namibia. ROSINA C. SCIALDO-KRECEK, R. K. REINECKE and H. C. BIGGS Neoplasia A survey of neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. Ill. Tumours occurring in pigs and goats. STELLA S. BASTIANELLO A survey of neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. IV. Tumours occurring in equidae. STELLA S. BASTIANELLO Tumours occurring in the cat. STELLA S. BASTIANELLO A survey of neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. VI. Tumours occurring in dogs. STELLA S. BASTIANELLO Numerical taxonomy The aplication of numerical taxonomy in the classification of staphylococci from bovine milk. J. A. ERASMUS..... Oil adjuvant C. M. CAMERON, B. J. VAN BIUON, W. J. S. BOTHA and P. C. KNOETZE Organophosphate testing storage prior to organophospate testing. A. M. SPICKETT and A. J. NARI HENRIOUD... Ovine neutrophils The reaction of ovine neutrophils to Histophilus ovis in relation to genital infection of rams. B. C. JANSEN, MARIANNA HAYES and P. C. KNOETZE Ovine photosensitivity Photosensitivity in South Africa. Ill. Ovine hepatogenous photosensitivity caused by the plant Athanasia trifurcata L. (Asteraceae). T. S. KELLERMAN, J. A. W. COETZER, D. J. SCHNEIDER and WILHELMINA G. WELMAN...: axillaris (Thunb.) Harv. ex Jackson J. A. W. COETZER and T. BERGH facial eczema and geeldikkop (Tribulosis ovis), with special reference to their pathogenesis. J. A. W. COETZER, T. S. KELLERMAN, W. SADLER and G. F. BATH Ovine pulmonary adenomatosis Isolation and preliminary characterization of the jaagsiekte retrovirus (JSRV). D. W. VERWOERD, ANNA-LISE PAYNE, D. F. YORKandM. S. MYER The morphology and morphogenesis of jaagsiekte retrovirus (JSRV). ANNA-LISE PAYNE, D. W. VERWOERD and HELEN M. GARNETT Parasites KRECEK Studies on the parasites of zebra. II. Cyclicostephanus longiconus n. sp. (Nematoda: Strongylidae) from the mountain zebra, Equus zebra hartmannae (Matschie, 1898). ROSINA C. SCIALDO-KRECEK (Connochaetes taurinus and Connochaetes gnou). I. G. HORAK, V. DEVOS and MOIRA R. BROWN Studies on the parasites of zebras. III. Nematodes of the mountain zebra from the farm " Kelpie"and the Namib-Naukluft Park, South West Africa/Namibia. ROSINA C. SCIALDO-KRECEK, R. K. REINECKE and H. C. BIGGS... Pasteurella heamolytica The usefulness of the API 20 E classification system in the identification of Actinobacillus actinomycetem comitans, Actinobacillus seminis and Pasteurella haemolytica. J. A. ERASMUS Pasteurella multocida The inefficacy ofpolivalent Pasteurella multocida vaccines for sheep. C. M. CAMERON and FAITH J. BESTER... Pathogenesis Photosensitivit~ in South Africa. V. A. comparative study of the pathology of the ovine hepatogenous photosensitivity dtseases, facta! eczema and geeldikkop (Tribulosis ovis), with special reference to their pathogenesis. J. A. W. COETZER, T. S. KELLERMAN, W. SADLER and G. F. BATH

6 Pelea capreolus Haemonchus contortus from the vaal ribbok, Pelea capreolus, and the bontebok. Damaliscus dorcas dorcas, in the Bontebok National Park. J. BOOMKER, I. G. HORAK, LYNDA M. GIBBONS and V. DEVOS Phacochoerus aethiopicus The prevalence of helminth and arthropod parasites of warthog, Phacochoerus aethiopicus, in South West Africa/Namibia. I. G. HORAK, H. C. BIGGS, TAMMY S. HANSSEN and ROSE E. HANSSEN Pheromone A bioassay technique for the pheromone emitted by Amblyomma hebraeum males. Y. RECHAV Phosphorus Failure of bone phosphorus levels to indicate dietary intake of phosphorus by sheep. P. C. BELONJE and A. VAN DEN BERG Photosensitivity Photosensitivity in South Africa. Ill. Ovine hepatogenous photosensitivity caused by the plant Athanasia trifurcata L. (Asteraceae). T. S. KELLERMAN, J. A. W. COETZER, D. J. SCHNEIDER and WILHELMINA G. WELMAN axillaris (Thunb.) Harv. ex Jackson. J. A. W. COETZER and T. BERGH facial eczema and geeldikkop (Tribulosis avis), with special reference to their pathogenesis. J. A. W. COETZER, T. S. KELLERMAN, W. SADLER and G. F. BATH Physiopathology and the QRS complex. A. LmLEJOHN, C. BUTTON and FELICITY BOWLES Some physiopathological features of experimental Homeria glauca.(wood & Evans), N. E. Br. poisoning in Merino sheep. C. BUTTON, F. REYERS, D. G. A. MELTZER, MARIAS. G. MULDERS and VALERIE M. KILLEEN Pigs A survey of neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. III. Tumours occurring in pigs and goats. STELLA S. BASTIANELLO Pwave Studies on the physiopathology of chronic obstructive pulmonary disease in the horse. VIII. Mean modal vectors of the P wave and the QRS complex. A. LITTLEJOHN, C. BUTTON and FELICITY BOWLES QRScomplex and the QRS complex. A. LITTLEJOHN, C. BUTTON and FELICITY BOWLES Rams The reaction of ovine neutrophils to Histophilus avis in relation to genital infection of rams. B. C. JANSEN, MARIANNA HAYES and P. C. KNOETZE The epidemiology of bacterial infection of the genitalia in rams. B. C. JANSEN Retrovirus Isolation and preliminary characterization of the jaagsiekte retrovirus (JSRV). D. W. VERWOERD, ANNA-LISE PAYNE, D. F. YORK and M. S. MYER The morphology and morphogenesis of jaagsiekte retrovirus (JSRV). ANNA-LISE PAYNE, D. W. VERWOERD and HELEN M. GARNETT Rhipicephalus kochi Clarification of the status of Rhipicephalus kochi Diinitz, 1905 (Ixodoidea; Ixodidae). C. M. CLIFFORD, JANE B. WALKER and J. E. KEIRANS Scanning electron microscopy Scanning electron microscopy of the tegumental surface of Heterobilharzia americana (Trematoda: Schistosomatidae). ROSINA C. SCIALDO-KRECEK Scanning electron microscopy of Strongylus spp. in zebra. H. J. ELS, F. S. MALAN and ROSINA C. SCIALDO-KRECEK... Schistosomatidae Scanning electron microscopy of the tegumental surface of Heterobilharzia americana (Trematoda: Schistosomatidae). RO- SINA C. SCIALDO-KRECEK Sheep Failure of bone phosphorus levels to indicate dietary intake of phosphorus by sheep. P. C. BELONJE and A. VAN DEN BERG The inefficacy ofpolivalent Pasteurella multocida vaccines for sheep. C. M. CAMERON and FAITH J. BESTER.... Some physiopathological features of experimental Home ria glauca.(wood & Evans) N. E. Br. poisoning in Merino sheep. C. BUTTON, F. REYERS, D. G. A. MELTZER, MARIAS. G. MULDERS and VALERIE M. KILLEEN Retardation of wool growth in Merino sheep caused by bacteria. B. C. JANSEN and MARIANNA HAYES Forsk. L. A. P. ANDERSON, R. ANITRA SCHULTZ, J. P. J. JOUBERT, L. PROZESKY, T. S. KELLERMAN, G. L. ERASMUS and J. PROCOS The experimental production of krimpsiekte in sheep with Tylecodon grandijlorus (Burm. F.) Toelken and some of its bufadienolides. L. A. P. ANDERSON, J. P. J. JOUBERT, L. PROZESKY, T. S. KELLERMAN, R. ANITRA SCHULTZ, J. PROCOS and PHILLIPP A M. OLIVIER Simulium chutteri The. infl uence of water-level fluctuation on the drift of simulium chutteri Lewis, 1965 (Diptera, Nematocera) in the Orange R1ver, South Afnca. M. CAR Skin lesions Bovine skin lesions of possible filarial origin associated with heavy homfly infestations (Haematobia meridiana). S. J. NEWS HOLME, ANNA J. M. VERSTER and J. C. JACOBS Spodoptera exempta Intoxication of cattle on kikuyu grass following army worm (Spodoptera exempta) invasion. S. J. NEWSHOLME, T. S. KELLERMAN, G. C. A. VAN DER WESTHUIZEN and J. T. SOLEY

7 Staphylococci The application of numerical taxonomy in the classification of staphylococci from bovine milk. J. A. ERASMUS Strongylidae Studies on the parasites of zebra. II. Cyclicostephanus longiconus n. sp. (Nematoda: Strongylidae) from the mountain zebra, Equus zebra hartmannae (Matschie, 1898). ROSINA C. SCIALDO-KRECEK Strongylus spp. Scanning electron microscopy of Strongylus spp. in zebra. H. J. ELS, F. S. MALAN and ROSINA C. SCIALDO-KRECEK Sylvicapra grimmia Some helminth and arthropod parasites of the grey duiker Sylvicapra grimmia. J. BOOMKER, W. H. DU PLESSIS and ELIZABETH A. BOOMKER Tegumental surface Scanning elctron microscopy of the tegumental surface of Heterobilharzia americana (Trematoda: Schistosomatidae). ROSINA C. SCIALDO-KRECEK Tetanus C. M. CAMERON, B. J. VANBIUON, W. J. S. BOTHAandP. C. KNOETZE Theileria parva lawrencei Chemotherapy of Theileria parva lawrencei infections in cattle with halofuginone. A. J. DEVOS and J. A. ROOS.... Thrombocyte levels Treatment and thrombocyte levels in experimentally induced canine ehrlichiosis and canine babesiosis. J. VAN HEERDEN, F. REYERS and C. G. STEW ART Ticks The effect of tick control on the epidemiology of bovine babesiosis. A. J. DEVOS and F. T. POTGIETER.... Notes on African Haemaphysalis ticks. XV. H. (Rhipistoma) norvali sp. n., a hedgehog parasite of the H. (R.) spinulosa group in Zimbabwe (Acarina: Ixodidae). H. HOOGSTRAAL and HILDA Y. W ASSEF The ixodid tick burdens of various large ruminant species in South African nature reserves. I. G. HORAK, F. T. POT- GIETER, JANEB. WALKER, V. DE VOSandJ. BOOMKER Trematoda Scanning electron microscopy of the tegumental surface of Heterobilharzia americana (Trematoda: Schistosomatidae). ROSINA C. SCIALDO-KRECEK Tribulosis ovis Photosensitivity in South Africa. V. A. comparative study of the pathology of the ovine hepatogenous photosensitivity diseases, facial eczema and geeldikkop (Tribulosis avis), with special reference to their pathogenesis. J. A. W. COETZER, T. S. KELLERMAN, W. SADLER and G. F. BATH Tumours A survey of neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. III. Tumours occurring in pigs and goats. STELLA S. BASTIANELLO A survey on neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. IV. Tumours occurring in equidae. STELLA S. BASTIANELLO Tumours occurring in the cat. STELLA S. BASTIANELLO A survey on neoplasia in domestic species over a 40-year period from 1935 to 1974 in the Republic of South Africa. VI. Tumours occurring in dogs. STELLA S. BASTIANELLO Tylecodon grandiflorus The experimental production of krimpsiekte in sheep with Tylecodon grandiflorus (Burm. F.) Toelken and some of its bufadienolides. L. A. P. ANDERSON, J. P. J. JOUBERT, L. PROZESKY, T. S. KELLERMAN, R. ANITRA SCHULTZ, J. PROCOS and PHILLIPP AM. OLIVIER Vaalribbok Haemonchus contortus from the vaal ribbok, Pelea capreolus, and the bontebok, Damaliscus dorcas dorcas, in the Bontebok National Park. J. BOOMKER, I. G. HORAK, LYNDA M. GIBBONS and V. DEVOS Vaccines The inefficacy of polivalent Pasteurella multocida vaccines for sheep. C. M. CAMERON and FAITH J. BESTER.... Vectors and the QRS complex. A. LmLEJOHN, C. BUTTON and FELICITY BOWLES Warthog The prevalence of helminth and arthropod parasites of warthog, Phacochoerus aethiopicus, in South West Africa!Namibia. I. G. HORAK, H. C. BIGGS, TAMMY S. HANSSEN and ROSE E. HANSSEN Water-level fluctuation The influence of water-level fluctuation on the drift of Simulium chutteri Lewis, 1965 (Diptera, Nematocera) in the Orange River, South Africa. M. CAR Wild animals (Connochaetes taurinus and Connochaetes gnou). I. G. HORAK, V. DEVOS and MOIRA R. BROWN Wool growth Retardation of wool growth in Merino sheep caused by bacteria. B. C. JANSEN and MARIANNA HAYES.... Zebras KRECEK Sudies on the parasites of zebra. II. Cyclicostephanus longiconus n. sp. (Nematoda: Strongylidae) from the mountain zebra, Equus zebra hartmannae (Matschie, 1898). ROSINA C. SCIALDO-KRECEK Scanning electron microscopy of Strongylus spp. in zebra. H. J. ELS, F. S. MALAN and ROSINA C. SCIALDO-KRECEK... Studies on the parasites of zebras. III. Nematodes of the mountain zebra from the farm "Kelpie" and the Namib-Naukluft Park, South West Africa/Namibia. ROSINA C. SCIALDO-KRECEK, R. K. REINECKE and H. C. BIGGS