54 ASCAROIDEA 



bristles absent. Lateral organs goblet-shaped. Buccal 

 capsule rather short, prismoid. Oesophagus cliib-shaped. 

 Male unknown. Female genital tubes paired, opposed, 

 reflexed. Caudal glands and spinneret present. 



Hab. Marine. 



Genotype : /. exile Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol, ix, 261 and key. 



19. Laimella Cobb, 1920. 



Cuticle finely striated, with svibmedian rows of bristles.* 

 Lateral alae absent. Head rounded, with ten cephalic bristles. 

 Lips not apparent. Lateral organs spiral. Buccal capsule 

 apparently very narrow. An extremely minute tooth present 

 ( ?). Oesophagus with oval bulb posteriorly. Male unknown. 

 Female genital tubes paired, opposed, outstretched. Caudal 

 glands and spinneret doubtful. 



Hab. Marine. 



Genotype : L. longicauda Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol., ix, 261 and key. 



20. Omicronema Cobb, 1920. 



Cuticle rather coarsely striated, without bristles. Slight 

 lateral alae present. Head not distinct, with three crowns 

 each of six bristles. Lateral organs circular. Lips incon- 

 spicuous. Buccal capsule relatively short and broad. 

 Oesophagus slightly swollen posteriorly. Caudal end of male 

 without supplementary organs. Preanal and postanal sub- 

 median bristles present. Spicules slender. A sigmoid acces- 

 sory piece present. Testis single, outstretched. Female 

 genital tube single, anterior, outstretched. Caudal glands and 

 spinneret present. 



Hab. Marine. 



Genot3^e : O. litorium Cobb, 1920. 



Cobb, 1920, Co7itr. Sci. Nematol, ix, 265 and key. 



21. Pseudolella Cobb, 1920. 



Cuticle finely striated, without bristles or lateral alae. 

 Head not distinct, with four bristles. Lateral organs long 

 and slender, band-like. Lips indistinct. Buccal capsule long, 

 tubular, slightly expanded posteriorly, apparently with a small 

 ventral tooth at its anterior end. Oesophagus without bulb. 

 Caudal end of male without bristles. Spicules acutely pointed. 

 Two accessory pieces present, with blunt posterior processes. 



* In the text of Cobb's description the cuticle is also said to be 

 " naked." The bristles are mentioned in connection with the tail, and 

 are there said to occur throughout the body. 



