202 FILARIOIDEA 



Guyot, 1778 {fide Stiles & Hassall, 1905, not verified); 

 Cobbold, 1864, Entozoa, London, 147; Looss, 1904, Zool. 

 Jahrb., Syst., xx, 549; Stiles, in Stiles & Hassall, 1905, 

 U.S. Dept. Agric, Bur. Anim. Indust. Bull. 79, 150; Stiles, 

 1907, U.S. Public Health and Mar.-Hosp. Serv., Hyg. Lab. 

 Bull 34, 34, 40, 42; Leiper, 1913, Trans. Soc. Troj). Med. 

 Hyg., vi, 272; Fantham, Stephens & Theobald, 1916, The 

 Animal Parasites of Man, 409, 411. 



17. Micipsella Seurat, 1921. 



Body sharply attenuated at both ends. Cuticle not 

 striated, but bearing small, barely salient tubercles, disposed 

 in two alternating rows along each lateral line. No lateral 

 or caudal alae. Mouth * situated at the summit of a conical 

 process, and surrounded by a ring of small papillae. Two 

 pairs of submedian papillae situated close to the base of this 

 process. Tail in both sexes digitiform, relatively long, spirally 

 twisted, especially in the male. Male with five to seven pairs 

 of preanal and two pairs of postanal papillae. The papillae 

 may be asymmetrically disposed. Numerous tubercles on 

 the dorsal and ventral surfaces near posterior end of male. 

 Spicules short, subequal ; the left longer, terminating in a 

 point, the right blunt. Vulva near the posterior end of 

 the oesophagus. Common trunk of uterus long. Uterine 

 branches parallel. Eggs without shell, hatching in utero. 

 Embryos without " sheaths." 



Hab. Peritoneal cavity of a Rodent (one species known). 



Genotype : M. [Filaria] numidica (Seurat, 1917). 



Seurat, 1917, Compt. rend. Soc. Biol., Paris, Ixxx, 354; 

 1921, Bull. Soc. Hist. nat. Afrique du Nord, Alger, xii, 33. 



18. Pelecitus Railliet & Henry, 1910. 



Cuticle with faint longitudinal striations. Head rounded, 

 with a pair of lateral papillae, and four submedian papillae 

 which may be double. Mouth circular, without lip-like struc- 

 tures. Lateral alae extend throughout the length of the body 

 in both sexes. Tail of male truncate, with broad caudal alae. 

 Two to four pairs of preanal papillae present, or none. Pos- 

 tanal papillae vary in number. Spicules subequal, short, 

 transparent, with pointed tips. Tail of female with one or 

 two pairs of pedunculate papillae. Vulva close to anterior end. 



Hab. Connective tissue of limbs of Birds (free or in nodules). 



Genotype : P. [Spiroptera] heUcinus (Molin, 1860). 



Molin, 1860, Sitz. k. Akad. Wiss., Wien, xxxviii, 948; 

 Railliet & Henry, 1910, Compt. rend. Soc. Biol., Paris, Ixviii, 

 251 ; Skrjabin, 1916, Journ. Russe Zool., Petrograd, i, 748. 



* According to Seurat there is a short buccal capsule with cliitinoid 

 walls. 



