200 FILARIOIDEA 



One pair of large preanal and one pair of postanal papillae, 

 situated near the cloaca. Spicules very unequal ; the left 

 long and filiform. Vulva in oesophageal region. Ovo- 

 viviparous. Embryos in blood-stream of host, without 

 " sheath." 



Hab. External surface of crop of Gallinaceous birds (one 

 species known). 



Genotjrpe : L. marthae Seurat, 1917. 



Seurat, 1917, Bull. Soc. Hist. nat. Afrique du Nord, Alger, 

 viii, 208. 



13. Icosiella Seurat, 1917. 



Cuticle thin, transparent. Lateral fields wide. Mouth 

 with four prominent submedian, rounded papillae, and four 

 small submedian teeth. Oesophagus very long. Intestine 

 narrow and dark-coloured. Tail, in both sexes, short and 

 rounded. In the male the cloaca is bordered by two strong 

 lips. No caudal alae or papillae. Spicules unequal ; the 

 left longer. Vulva in oesophageal region. Ovoviviparous. 

 Embryos in blood-stream of host, with " sheath." 



Hab. Connective tissue of Frogs (one species known). 

 Genotype : /. [Filar ia] neglecta (Diesing, 1851), 



Diesing, 1851, Systema Helminthum, ii, 276; Seurat, 1917, 

 Bull. Soc. Hist. nat. Afrique du Nord, Alger, viii, 240. 



14. Politospiculum Skrjabin, 1916. 



Cuticle with fine transverse striations. Two narrow lateral 

 alae present, extending throughout the length of the body. 

 Head rounded, with two pairs of submedian and one pair of 

 lateral papillae. Mouth with two salient lateral lip-like 

 structures. Oesophagus with a narrow anterior portion and 

 a thicker posterior portion. Tail of male rounded. Four 

 pairs of pedunculate preanal papillae and four pairs of post- 

 anal papillae present. Spicules unequal and dissimilar ; the 

 left curved, slightly stouter proximally, the right shorter and 

 straight. Vulva in oesophageal region. 



Hab. Articular cavities of Birds (one species known). 

 Genotjrpe : P. arthricola Skrjabin, 1916. 



Skrjabin, 1916, Journ. Eusse Zool., Petrograd, i, 753. 



15. Setaria Viborg, 1795. 



Syn. Crinon Chabert, 1782 ; Crino Lamarck, 1801 ; Hamu- 

 laria Treutler, 1793, of Stiles, 1907 ; Tentacidaria Zeder, 1800, 

 of Stiles, 1907; ? Amularia Brera, 1810; ? Ancliiloceplmli 

 Brera, 1810; ? Helminthus Dnn^iaow, 1895; DeraiopJioronema 

 Romanovitch, 1916; Papillosetaria Yevers, 1923. 



