198 FILARIOIDEA 



van Beneden, 1873, Mem. Acad. Roy. Sci. Belg., xl, 21 ; 

 Seiirat, 1921, Bull. Mus. Hist, nat., Paris, i, 103. 



7. Hamatospiculum Skrjabin, 1916. 



Cuticle with fine transverse striations. Head rounded, 

 with four double submedian and two lateral papillae. Mouth 

 with two salient lateral lip-like structures. Oesophagus with 

 a narrow anterior portion and a wider posterior portion. Tail 

 of male rounded, with lateral alae. About five pairs of preanal 

 and six pairs of postanal papillae present, all with short 

 peduncles. Spicules two, very unequal and dissimilar; the 

 left with a hooked appendage and nearly ten times as long 

 as the right. Vulva in oesophageal region. 



Hab. Subcutaneous connective tissue of Birds (one species 

 known). 



Genotype : //. [Filaria] insigne (Schneider, 1866). 



Schneider, 1866, Monographie der Nematoden, Berlin, 91 ; 

 Skrjabin, 1916, Journ. Russe Zool., Petrograd, i, 751. 



8. Foleyella Seurat, 1917. 



Narrow lateral alae present, extending throughout the 

 length of the body. Lateral fields wide and conspicuous. 

 Mouth with six low papillae and four " outer " papillae. 

 Oesophagus very short, with narrower anterior portion and 

 stouter posterior portion. Rectum narrow and very long. 

 Tail of male with wide caudal alae. About foiu- pairs of 

 preanal and three pairs of postanal papillae present, all 

 pedunculate and very large, except the most posterior postanal 

 pair. An impaired sessile papilla on the anterior lip of 

 the cloaca. Spicules unequal; the right short and broad. 

 Vulva postoesophageal. Uterine branches run at first 

 posteriorly and parallel, then diverge, the oviducts being 

 situated anteriorly and posteriorly and enlarged into recep- 

 tacula seminis. Viviparous. Embrj^os with " sheath," occur- 

 ring in blood-stream of host. 



Hab. Subcutaneous connective tissue and muscles of a 

 Lizard (one species known). 



Genotj^e : F. [Filarial candezei (Fraipont, 1882). 



Fraipont, 1882, Bull Acad. Roy. Sci. Belg., Ixi, 104; Seurat, 

 1916, Compt. rend. Soc. Biol, Paris, 1133; 1917, Bidl. Sac. 

 Hist. nat. Afrique du Nord, Alger, viii, 236. 



9. Onchocerca Diesing, 1841. 



Cuticle thick, with transverse striations and also spiral 

 thickenings, often interrupted at the level of the lateral fields. 

 In the male usually one thickening for each striation ; in the 

 female the thickenings are at intervals of from two to four 



