SUBULURINAE 15 



papillae sessile, ten or eleven pairs. A single spicule and an 

 accessory piece present. Preanal sucker fusiform. Eggs 

 subglobular, containing embryos when laid. 



Hab. Intestine and caecum of Carnivores and Rodents. 



Genotype : 0. [Heterakis] crassispiculum (Sonsino, 1889) 

 (=0. rectum v. Linstow, 1899). 



Sonsino, 1889, AM. Soc. Tosc. Sci. Nat., Pisa, x, 227; 

 V. Linstow, 1899, 3Iitt. Zool. Mus., Berlin, i, 19. 



Barreto (1919, Mem. Inst. Osw. Cruz, Rio de Janeiro, xi, 

 51) has revived the genus Oxynema, which had been regarded 

 by some authors as a synonym of Allodapa, to include the two 

 species crassispiculum and boueti (Gendre, 1911), in which 

 only a single spicule is present. 



3. Heteroxynema Hall, 1916. 



Lips apparent. Teeth feebly, if at all, developed at the 

 base of the buccal capsule. Cervical alae present. Male 

 without spicules or accessory piece. Caudal papiUae eleven 

 pairs, mostly near the cloaca. Preanal sucker fusiform, 

 bordered, at the sides only, by a delicate cuticular membrane 

 ornamented with tranverse rows of trabeculae. Eggs bluntly 

 pointed, rather like those of Oxym-idae. 



Hab. Caecum and large intestine of a Rodent (one species 

 knowTi). 



Genotype : H. cucullatum Hall, 1916. 

 HaU, 1916, Proc. U. S. Nat. Mus., 1, 56. 



4. Numidica Barreto, 1919. 



Lips indistinct. Buccal capsule with thick walls, divided 

 into an anterior and a posterior chamber, the latter containing 

 three teeth at its base. Lateral alae absent. Male with 

 unequal spicules, the right larger and well-chitinized, the 

 left very slightly so. An accessory piece present. Caudal 

 papiUae pedunculate, ten pairs (four preanal, six postanal). 

 Preanal sucker elliptical, bordered by a rim covered with small 

 cuticular trabeculae. Eggs rounded, contaimng embryos 

 when laid. 



Hab. Intestine of Carnivores (one species known). 



Genotype : N. [Allodapa] numidica (Seurat, 1915). 



Seurat, 1913, Compt. rend. Soc. Biol., Paris, Ixxviii, 122 ; 

 Barreto, 1919, Mem. Inst. Osw. Cruz, Rio de Janeiro, xi, 57. 



According to Seurat, there are two indistinct lateral lips, 

 each bearing three papillae. 



5. Maupasina Seurat, 1913. 

 Syn. Maupasiella Sem-at, 1913. 



Lips not distinct. Mouth surrounded by three pairs of 



