144 ASCAROIDEA 



short, narrow grooves. Pharynx an elongate, probably 

 three-sided tube, narrowing a little behind, and furnished 

 anteriorly with three small teeth. Oesophagus with a 

 posterior bulb. Two ocelli present at the anterior end of the 

 oesophagus. Caudal end of male without papillae. An 

 accessory piece present. Female genital tubes paired. Caudal 

 glands present. 



Hab. Marine (littoral). 



Genotype : S. striatocaudatus de Man, 18S8. 



de Man, 1888, Mem. Soc. Zool. France, i, 34. 



13. Actinonema Cobb, 1920. 



Cuticle thick, coarsely striated, without bristles. " Head 

 set off by contraction and a deep constriction, subtruncate ; 

 mouth more or less depressed. The lip-region is one-half as 

 high as wide, and appears to be composed of three fairly well- 

 developed, rounded, subdistinct lips, which are set off by 

 constriction. This lip-region appears as if protruding from 

 within the thick cuticle. . . . On the lips there are no obvious 

 signs of a cuticle. The pharynx is very small and incon- 

 spicuous, or even absent apparently." Apparently a minute 

 dorsal tooth (situated, according to the figure, on one of the 

 " lips "). Lateral organs greatly elongate transverse slits. 

 Oesophagus swollen behind, without bulb. Caudal end of 

 male without supplementary organs or papillae. Spicules 

 rather stout, tapering. A single, slender, accessory piece 

 present. Testis single, anterior, outstretched. Female genital 

 tubes paired, opposed, refiexed. Caudal glands and spinneret 

 present. 



Hab. Marine. 



Genotype : A. pachydermatum Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol., ix, 338 and key. 



Subfam. 4. ENOPLINAE Micoletzky, 1922. 



Chitinoid wall of pharynx typically reduced to three stout 

 jaws, bearing simple or complex teeth anteriorly and connected 

 with the lips, which are eversible. Oesophagus more or less 

 club-shaped, usually without distinct bulb. 



1. Enoplus Dujardin, 1845. 



S3rn. Tricontus Dujardin, 1845 ; Lineola KoUiker, 1845, 

 nee Baer, 1827 ; Enoplolawms de Man, 1893 ; Demonema Cobb, 

 1894 ; Enoploides Savelev, 1912. 



Cuticle with transverse striations and without bristles 

 except near the extremities. Head usually with tliree lips 



I 



