114 ASCAROIDEA 



Hypodontolaimus, which was considered by Steiner (1916) 

 as a possible synonym of Chromadora, can be regarded as a 

 synonym of Spilophora on account of de Man's descrip- 

 tion of similar posterior pharyngeal processes. It appears 

 very dovibtful whether Trogolaimus can be separated from 

 Spilophora. 



8. Cobbionema Filipjev, 1922. 



Cuticle smooth, with rows of internal dots. Head not 

 distinct, with six ( ?) small lips and some slender bristles. 

 Lateral organs large, spiral. Pharjaix with a cup-shaped 

 anterior portion and a fumiel-shaped posterior portion. The 

 former is surrounded by circular muscles. The latter contains 

 three longitudinal chitinoid thickenings, each bearing at its 

 anterior end several small teeth, irregularly arranged. Oesoph- 

 agus with an anterior swelling, and somewhat swollen 

 posteriorly, but without bulb. Male undescribed. Female 

 genital tubes paired. Tail of female sharply constricted a 

 little behind the anus. Spinneret present. 



Hab. Marine. 



Genotype : C. acrocerca Filipjev, 1922. 



Filipjev, 1922, Act. Inst. Agronom. Stauropol., i (ZooL), 

 16, 114. 



9. Bolbella Cobb, 1920. 



Cuticle very finely transversely striated, and also longi- 

 tudinally striated, with some fine bristles towards the 

 extremities. Head not distinct, truncate, with six circum- 

 oral papillae and a single crown of ten bristles (two single, 

 lateral, and four submedian pairs). Lateral organs stirrup- 

 shaped, with transversely elliptical anterior opening. Pharjnix 

 in two portions, the anterior slightly wider than the posterior. 

 The latter contains three teeth, the dorsal and left sub- 

 ventral teeth small, the right subventral elongate and spear- 

 like, extending forward into the anterior chamber of the 

 pharynx. Oesophagus long, with a slender anterior portion 

 and a stouter posterior portion consisting of a series of rounded 

 bulbs. Caudal end of male with two cup-shaped preanal 

 supplementary organs. Accessory piece ( ? pieces) with long 

 posterior process. Testes paired, opposed, outstretched. 

 Female genital tubes paired, opposed, reflexed. Caudal 

 glands (preanal) and spinneret present. 



Hab. Marine (in sand). 



Genotjqje : B. tenuidens Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol, ix, 308 and key. 



10. Polygastrophora de Man, 1922. 

 Cuticle unstriated but with bristles. Head slightly dis- 

 tinct. Twelve cephalic bristles present. Mouth probably 



