ONCHOLAIMINAE 123 



passing into the lining of the oesophagus. Oesophagus 

 gradually swollen behind, without bulb. Spicules broad, 

 membranous. Accessory piece complex. Testis single. 

 Female genital tubes paired, reflexed. 



Hab. Marine. 



Genotype : C. pontica Filipjev, 1918. 



Filipjev, 1918, Trav. Lab. Zool., Stat. Biol. Sebastopol, 

 Ser. II, No. 4, 213, 229. 



29. Rhlps Cobb, 1920. 



Cuticle coarsely striated, with rod-like or basketwork-like 

 ornamentation. Head not distinct, apparently with six 

 very small, double lips. Six labial papillae and ten cephalic 

 bristles present. At the level of the latter there are also 

 four shorter sublateral " scales " or " horns." Lateral organs 

 transversely elongate. Pharynx small, containing an an- 

 teriorly-directed dorsal tooth and " one or two " minute 

 subventral teeth. Oesophagus somewhat swollen behind. 

 Caudal end of male probably with a series of preanal supple- 

 mentary organs. Spicules composed of two curved sections 

 jointed together end to end, the posterior section shorter 

 than the anterior. Five accessory pieces present, two in 

 front of the spicules and three behind them. Testis single, 

 anterior, outstretched. Female genital tubes paired, opposed, 

 reflexed. Caudal glands and spinneret present. 



Hab. Marine. 



Genotype : R. ornata Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol., ix, 339 and key. 



30. Linhomoeus Bastian, 1865. 



Cuticle finely striated, with bristles, especially anteriorly. 

 Head not distinct, without apparent lips but with bristles. 

 Lateral organs small, circular. Oral cavity widening behind 

 into a shallow pharynx which may or may not be armed 

 with teeth at its base. Oesophagus somewhat swollen 

 posteriorly, without bulb. Caudal end of male apparently 

 without papillae, but with two preanal supplementary organs. 

 Testes paired and opposed, or single. An accessory piece 

 present, with two posterior processes. Female genital tubes 

 paired, opposed (exceptionally single), reflexed. Caudal 

 glands and spinneret present. 



Hab. Marine. 



Genotype : L. hirsutus Bastian, 1865. 



Bastian, 1865, Trans. Linn. Soc. London, xxv, 154; deMan, 

 1889, Mem. Soc. Zool. France, ii, 207 ; 1907, Tijdschr. Nederl. 



