250 



ON ENTOZOA OF THE HIPPOPOTAMUS. 



[Feb. 1, 



11. Paramphistomum cotylophorum Fischoeder 



A phial sent by Dr. Sells and labelled " from the Hippo- 

 potamus" contained a number of specimens of this species. As 

 P. cotylophorum is by far the commonest parasite of cattle, 

 buffaloes and antelopes in Uganda, it is by no means impossible 

 that infection of the Hippopotamus may occur. On the other 

 hand, there may have been a mistake in the labelling, for another 

 phial of similar forms " from a Buffalo " was received at the same 

 time. 



12. Paramphistomum wagandi, sp. n. (Text- fig. 35.) 



A few specimens of this species occur in Dr. Sells' collection. 

 They are small and whitish and fairly closely resembling grains of 

 boiled rice. The specimens have a length, in section, of 3 - 5 mm. 

 and a dorso- ventral diameter of 1*2 mm., and are very like 

 P. sellsi in outward appearance. The genital pore is, however, 

 very minute, and a genital sucker is absent. 



Text-fig. 35. 



Paramphistomum wagandi. Median longitudinal section. 



The pharynx is poorly developed when compared with other 

 forms. It is elongated in shape, measuring 0*3 mm. in length, 

 0*14 mm. in greatest diameter, and has a musculature of 0*07 mm. 



The oesophagus measures 033 mm. in length and bifurcates at 

 the level of the genital pore. 



The ventral sucker lies subterminally and has a transverse 

 measurement of 0'5 mm. The musculature of its dome is 0*2 mm. 

 thick. The dorso-ventral diameter of its cavity is 0*37 mm. 



The excretory vesicle lies dorsal to and slightly in front of the 



