42 ASCAROIDEA 



with Bhahditolaimus, proposed as a genus by Fuchs, 1915. 

 Apart from the fact that the species attributed to Ehabdito- 

 laimus are found associated, in a semi-jjarasitic condition, with 

 insects, the only differences between the subgenera appear 

 to be that in Ehabditolaimus the cuticle is, in species with a 

 typical buccal cavity, marked with longitudinal striations 

 resolvable into groups of dots, and in the other species the 

 teeth are absent or rudimentary ; while in Diplogaster the 

 cuticle, if longitudinally striated, is not marked with groups of 

 dots. These distinctions seem highly unsatisfactory, and the 

 subgenera untenable. Diplogasteroides does not appear to 

 possess sufficient characters to separate it from Diplogaster. 



9. Demaniella Steiner, 1914. 



Syn. Demania Steiner, 1914, nee Laurie, 1906, nee Southern, 

 1914. 



Cuticle finely striated. Head not distinct, bluntly rounded, 

 without lips, papillae or bristles. A small, conical, perforated 

 stylet in front, and surrounding it at a short distance nine 

 small crescentic cuticular thickenings. Buccal cavity pris- 

 matic, with rod-like chitinoid thickenings, and at its base a 

 large dorsal tooth. Oesophagus with a median cylindrical 

 muscular bulb and a slight posterior bulb. Male unknown. 

 Female genital tubes paired. 



Hab. Among rotting grass. 



Genotj^e : D. [Demania] cibourgensis Steiner, 1914. 

 Steiner, 1914, Arch. f. Hydrobiol. u. Planktonk., Stuttgart, 

 ix, 426. 



10. Chambersiella Cobb, 1920. 



Cuticle very finely striated, without bristles. Lateral alae 

 present. Lateral organs transversely oval. Six branched, 

 non-motile, cephalic cirri present, and behind these six short 

 bristles with swollen bases. Buccal capsule like that of 

 Cephalobiis, but not tapering posteriorly, with walls composed 

 of rods, and with six powerful, protrusible labial teeth ante- 

 riorly. Oesophagus with a cylindrical prebulbar swelling and 

 a posterior bulb. Tail conical, with tip hooked dorsaUy, and 

 with paired lateral pores. Tail of male without alae, but with 

 numerous preanal and postanal papillae. Spicules knobbed. 

 An accessory piece present. Testis single, reflexed. Vulva 

 prominent, slightly behind the middle of the body. A single 

 uterine branch, anterior, with ovary reflexed and running 

 posteriorly to near the anus. Eggs segmenting when laid. 



Hab. On bark of trees, and in moss. 



Genot3rpe : C. rodens Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol, ix, 278; Micoletzky, 1922, 

 Arch.f. Naturg., Abt. A, Ixxxvii, 297. 



