NEMATODE PARASITES OF CUAPMAN's ZEBRA. 441 



30. On the Nematode Parasites of a Cliapman's Zebra. 

 By M. Turner, B.Sc. 



TReceived October 8, 1919 : Read November 18, 1919.] 

 (Text-figures 1-6.) 



In September of this year a Chapman's Zebra, which came 

 from Africa to the Zoological Gardens, London, ten years ago, 

 died. The post-mortem showed that its large intestine contained 

 many Nematode parnsites, A collection of them was made by 

 Professor Leiper, and, through bis kindness, I was enabled to 

 examine the material in detaih 



Altogether seven species of Nematodes were represented in the 

 Zebra. An enumeration of them is as follows : — 



Oxyuris cicrvida Rud. 1803. 

 Stro)igi/lus vulgaris (Looss, 1901). 

 S'trougi/las edentatus (Looss, 1901). 

 Triodontophorits in-termed his Sweet, 1909. 

 G^sfrphagodontus rohustus Giles, 1892. 

 (?) Cylichnostomum goldi Boulenger, 1916. 

 C i/lichnostoraiiin zehra;, sp. n. 



The real object of these investigations was to ascertain whether 

 any of the parasites had lived in the Zebra in Africa, and had 

 persisted thi'oughout the ten years in England, or whether they 

 had only been acquired by the Zebi'a since its arrival in England. 

 This point, however, was not definitely clenred up, as none of the 

 Nematodes found can be said to have a solely English or African 

 distribution. Thus Oxyuris curvida, Strongylus vulgaris, and 

 Strongylus edentatus are found all over the world. Triodonio- 

 2)horus intermeditcs has been recorded from Australia and England, 

 and (Esophagodontus robustus from India and England. The 

 localities are so far apart that it would seem probable that these 

 species are present in intervening countries. Cylichnostomum 

 goldi has been recorded onlj^ once, and that so lately as 1916, 

 when it was found in England. Moi'e I'ecords of its occurrence 

 and their locality are necessary before it is possible to state its 

 distribution definitely. Cylichnostomum zehrce is an hitherto 

 undescribed species. 



The impression obtained from the above facts is that the 

 Zebra acquired the majority, at least, of its parasites in England, 

 though no definite proof of this is given. 



Oxyuris curvlla Rudolphi, 1803. 



Two males were found in the Zebra. This discovery is inter- 

 esting, as the males of this species of Oxyuris are rather rare. It 

 was on account of this rarity that the male was only described, 

 and figured for the first time by Ilailliet, in 1895, although the 



