KATHLANIIDAE 19 



Spicules subequal, alate. A large subtriangular accessory 

 piece present. Tail of female tapering. Vulva slightly in 

 front of the middle of the body, not prominent. Eggs 

 relatively large, with thick, rugose shell, containing embryos 

 when laid. 



Hab. Caecum and large intestine of Opossums (one species 

 known). 



Genotype : C. [Ascaris] tentaculata (Rudolphi, 1819). 



Rudolphi, 1819, Entozoorum Synojjsis, 658 ; Travassos, 1917, 

 Brazil. Med., Rio de Janeiro, xxxi, N. 12; 1922, Mem. Inst. 

 Osw. Cruz, Rio de Janeiro, xiv, N. 1. 



This genus appears to fall naturally into the family Kath- 

 laniidae, the characters in which it differs from the preceding 

 genera being so slight that, in our view, they do not justify 

 the erection of a distinct family Cruzidae, as is proposed by 

 Travassos. Nor can we follow Ortlepp (1924, Journ. Hel- 

 minthol., ii, 17), who proposes to erect for Cruzia a new 

 subfamily, Cruzinae, of the family Heterakidae. 



6. Cissophyllus Railliet & Henry, 1912. 



Lips complex ; the dorsal lip trident-shaped, the ventro- 

 lateral lips fiirnished with groups of lancet-like teeth. Buccal 

 capsule apparently absent. Oesophagus with a pharynx and 

 a posterior bulb. Tail of male without alae. Caudal papillae 

 small, sessile. Spicules subequal. An accessory piece present. 

 Preanal sucker fusiform. Vulva in posterior third of body. 

 Uterine branches parallel. Eggs segmenting when laid. 



Hab. Intestine of Chelonia. 



Genotype : C. laverani Railliet & Henry, 1912. 



Railliet & Henry, 1912, Bull. Soc. Path, exot., Paris, v, 253. 



7. Probstmayria Ransom, 1907. 



Head truncate. Lips bilobed, the dorsal lip having two 

 papillae with long peduncles, the ventro-lateral lips each one 

 such papilla. Pharynx tubular, composed of a small anterior 

 portion without muscles and a longer, muscular, posterior 

 portion. Caudal end of male without sucker-like organ. 

 Several pairs of small postanal papillae present. Spicules 

 short, subequal. Tail in both sexes long and tapering. Vulva 

 about the middle of the body. Viviparous (eggs few and 

 large, hatching in uterus). 



Hab. Colon of Equidae (one species known). 



Genotype : P. [Oxyuris] vivipara (Probstmayr, 1865). 



Probstmayr, 1865, Wochenschr. f. Thierh. u. Viehz., Augs- 

 burg, ix, 178; Ransom, 1907, Trans. Amer. Microsc. Soc, 

 xxvii, 33 ; Baylis, 1923, Parasiiol., xv, 36. 



