132 ASCAROIDEA 



three. Six ( ?) labial papillae and a crown of cephalic bristles 

 present. Lateral organs circular. Pharynx short and wide, 

 containing a relatively large, forwardly-projecting tooth. 

 Ofesophagus swoUen gradually behind, without bulb. A pair 

 of ocelli present. Caudal end of male with a single large 

 supplementary organ, and apparently some caudal papillae. 

 Spicules slender. Accessory pieces present both in front of 

 and behind the spicules. Testes paired, opposed, outstretched. 

 Female undescribed. Caudal glands and spinneret present. 



Hab. Marine. 



Genotype : C. ocellatus Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol, ix, 328 and key. 



9. Anoncholairaus Cobb, 1920. 



Cuticle finely striated, very thin. A few bristles on the 

 tail. Head not distinct, with thin, flattened lips. Labial 

 papillae and a crown of cephalic bristles present. Lateral 

 organs small, transversely elliptical, opening anteriorly. 

 Pharynx nearly as wide as long, straight-sided anteriorly, 

 somewhat narrower behind. At its anterior end there is a 

 vestigial dorsal tooth. Oesophagus somewhat expanded at 

 each end, without bulb. Male undescribed. Female genital 

 tubes paired, opposed, reflexed, the posterior ovary a little 

 smaller than the anterior. Caudal glands (preanal) and 

 spinneret isresent. 



Hab. Marine. 



Genotype : A. mobilis Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol, ix, 312 and key. 



10. Asymmetrella Cobb, 1920. 



Cuticle unstriated. Head slightly distinct, with three 

 unequal lips and a crown of ten bristles. Lateral organs 

 apparently large, transversely elliptical, open behind. Pharynx 

 cylindrical, spacious, considerably longer than wide, with a 

 dorsal tooth at its entrance, bent inwards at right angles. 

 Oesophagus cylindroid, without bulb. Three ocelli ( ?) present. 

 Male unknown. Female genital tubes " probably double and 

 symmetrically placed." (Description apparently based on a 

 single immature female). 



Hab. Sea-water. 



Genotype : A. glabra Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol, ix, 287 and key. 



11. Isonemella Cobb, 1920. 



Cuticle unstriated, with bristles only at the extremities. 

 Head narrowed, without recognizable lips. Ten cephalic 



