104 ASCAROIDEA 



Hab. Marine. 



Genotype : D. [Dipeltis] typicus (Cobb, 1891). 



Cobb, 1891, Proc. Linn. Soc. N.S.W., Sydney, vi, 155; 

 Stiles & Hassall, 1905, U.S. Dept. Agric, Bur. Anivi. hidust. 

 Bull. 79, 100, 101. 



41. Zygonemella Cobb, 1920. 



Cuticle coarsely striated, without bristles except in cervical 

 region. Lateral alae apparently absent. Head with two 

 crowns of bristles. Lips three, indistinct, faintly bilobed. 

 Lateral organs transversely elliptical. Pharynx indistinguish- 

 able except for a slight posterior expansion of its lumen. 

 Oesophagus without posterior bulb. Caudal end of male 

 apparently without supplementary organs or papillae. Testes 

 paired, opposed, refiexed; the anterior about twice as long 

 as the posterior. Caudal glands ■ and spinneret present. 

 Female undescribed. 



Hab. Marine. 



Genotype : Z. striata Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol., ix, 247 and key. 



42. Spirina Filipjev, 1918. 



Syn. Spira Bastian, 1865, nee Brown, 1838. 



Cuticle striated, with few bristles. Head not distinct, with 

 bristles. Lateral organs circular, prominent or depressed. 

 No buccal cavity. Oesophagus short, considerably swollen 

 behind, but without distinct bulb. Caudal end of male 

 without papillae or supplementary organs. Two accessory 

 pieces present. Female genital tubes paired, opposed. 

 Spinneret small and indistinct. 



Hab. Marine. 



Genotype : S. [Spira] parasitijera (Bastian, 1865). 



Bastian, 1865, Trans. Linn. Soc. London, xxv, 159 ; Filipjev, 

 1918, Trav. Lab. Zool, Stat. Biol. Sebastopol, Ser. II, No. 4, 232. 



43. Nemanema Cobb, 1920. 



Head without lips. Lateral organs apparently circular, 

 connected with cutinized ducts. Buccal capside exceedingly 

 minute, conoid, " possibly with a forward pointing tooth." 

 Oesophagus expands gradually behind. Caudal end of male 

 with a few ventral preanal and postanal bristles. Female 

 genital tubes paired, opposed, refiexed, the anterior branch 

 rudimentary. Caudal glands present. 



Hab. Marine (among sand and Algae). 

 Genotype : N. simplex Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol, ix, 230 and key. 



