SPIRURINAE 211 



1. Spirura E. Blanchard, 1849, nee Diesing, 1861. 



Lips poorly developed, surrounded at their bases by a pro- 

 jecting cuticular collar which is specially prominent dorsally 

 and ventrally. A buccal capsule present. Body-wall raised 

 some distance from the anterior end into a hump on the 

 ventral surface, serving as a hold-fast. No cervical alae. Tail 

 of male with well-developed alae. Four pairs of preanal 

 papillae and a single median precloacal papilla present. Five 

 pairs of postanal papillae. Spicules somewhat unequal, the 

 shorter alate. Tail of female bluntly conical and curved 

 ventrally. Vulva in middle region of body. Uterine branches 

 opposed. 



Hab. Alimentary canal, chiefly stomach, of Rodents and 

 Insectivores. 



Genot3qoe : S. {Ascaris] ialpae (Gmelin, 1790) [= Spiroptera 

 strumosa Rudolphi]. 



Gmelin, 1790, Systema Naturae, 13th ed., 3032; E. Blan- 

 chard, 1849, Ami. Sci. Nat., Paris, Zool., xi, 161 ; Seurat, 

 1915, Novit. Zool, London, xxii, 7; Hall, 1916, Proc. U.S. 

 Nat. 3Ius., 1, 199. 



2. Protospirura Seurat, 1914. 



Syn. Cephalacanthus Diesing, 1853, e.p. ; Mastophorus 

 Diesing, 1853, e.p. 



Each lip with three lobes, each of which carries three teeth 

 on its inner surface. A buccal capsule present. Tail of male 

 with well-developed alae. Four pairs of subventral preanal 

 papillae, with short peduncles, and an unpaired precloacal 

 papilla. Two pairs of large postanal papillae and a group of 

 small pajiillae near the tip of the tail. Right spicule longer 

 and stouter than the left, which is alate distally. Tail of 

 female short. Vulva in the middle region of the body. 

 Uterine branches opposed. 



Hab. Stomach of small Mammals, chiefly Rodents. 

 Genotype : P. numidica Seurat, 1914. 



Seurat, 1914, Compt. rend. Soc. Biol., Paris, Ixxvii, 344; 

 Hall, 1916, Proc. U.S. Nat. Mus., 1, 203. 



3. Habronema Diesing, 1861. 



Syn. Cyrnea Seurat, 1914; Dermofilaria Rivolta, 1884. 



Cervical alae may be present. Lips large, entire or tri- 

 lobed, sometimes with internal teeth, and overlapped dorsally 

 and ventrally by shields of cuticle [sometimes described as 

 dorsal and ventral lips]. A well-developed buccal capsule 

 present. Tail of male with wide alae. Four paii's of preanal 

 papillae and a variable number of postanal papiUae, usually 



