162 STRONGYLOIDEA 



cleft almost to its origin, or its main branches may appear 

 to be fused almost to the tip. There are externo-dorsal rays 

 and two pairs of accessory branches. The latter spring from 

 the branches of the main dorsal ray. Spicules long, filiform, 

 equal. Tail of female acutely pointed. Vulva close to anus. 



Hab. Intestine of Ruminants. 



Genotype : E. longesubnlatum Molin, 1861. 



Molin, 1861, 3Iem. R. 1st. Veneto, ix, 435, 455; Ransom, 

 1911, U.S. Dept. Agric, Bur. Anim. Indust. Bull. 127, 38. 



This genus is insufficiently known. 



13. Deletrocephalus Diesing, 1851. 



External leaf-crown composed of six elements, fibrous and 

 opaque, " dilated at each end," converging in front. Mouth 

 terminal, suborbicular. Bursa excised, with many rays. 

 Tail of female pointed, straight. Vulva near anus. 



Hab. Alimentary tract of Rhea. 

 Genotype : D. dimidiatus Diesing, 1851. 



Diesing, 1851, Systema Helminthum, ii, 298 ; 1855, Denkschr. 

 k. Akad. Wiss., Wien, ix, 183. 



This genus is insufficiently characterized. It is uncertain 

 whether the forms described as D. dimidiatus by later authors 

 were identical with Diesing's species. 



14. Cloacina v. Linstow, 1898. 



Cuticle with prominent transverse striations. Lateral 

 fields so highly developed as sometimes to meet in the middle 

 axis of the body. Head with six lips, a dorsal, a ventral and 

 four submedian, each of the latter bearing a projecting, club- 

 shaped papilla. Buccal capsule a shallow ring. An internal 

 leaf-crown apparently present. Bursa entire, almost circular. 

 Dorsal ray bifurcate for about two-thirds of its length, each 

 branch bearing a short accessory branch. Externo-dorsal 

 rays originate separately from the dorsal ray. Postero-lateral 

 and medio-lateral rays closely apposed ; an tero -lateral widely 

 separated from them. Latero-ventral and ventro-ventral 

 rays closely apposed. Spicules very long. Tail of female 

 tapering, curved dorsally. Vulva very close to anus.* 

 Uterine branches parallel. 



Hab. Alimentary canal of Kangaroo. 

 Genotjrpe : C. dahli v. Linstow, 1898. 



V. Linstow, 1898, Arch. f. Naturg., Ixiii, i, 286; Railliet & 

 Henry, 1912, Arch. Parasitol., Paris, xiv, 563; 1913, Bull. 

 Soc. Path, exot., Paris, vi, 506. 



* von Linstow describes the vulva as opening with the anus into a 

 common cloaca. According to Railliet & Henry (1913), however, this 

 is inaccurate. 



