BUNONEMINAE 57 



27. Haliplectus Cobb, 1913. 



Cuticle finely striated, without bristles. Head truncate, 

 without bristles. Lateral organs circular. Buccal capsule, 

 if present, very narrow. Oesophagus with median and pos- 

 terior bulbs. Caudal end of male with six supplementary 

 organs. About six pairs of postanal papillae present. An 

 accessory piece present. Testes paired, opposed, out- 

 stretched. Female genital tubes paired, opposed, reflexed. 

 Caudal glands and spinneret present. 



Hab. Brackish and sometimes fresh water. 

 Genotype : H. inllucidus Cobb, 1913. 



Cobb, 1913, Journ. Washington Acad. Sci., iii, 443 and key. 



28. AuloIaimoid.es Micoletzky, 1917. 



Cuticle unstriated, without bristles or lateral alae. Head 

 not distinct, truncate, without bristles. Lateral organs semi- 

 circular, open behind. Buccal capsule narrow, three-sided. 

 Oesophagus with a spindle-shaped median swelling and a 

 somewhat cylindrical posterior bulb. Caudal end of male 

 with preanal and postanal papillae. An accessory piece 

 present. Testis single. Female genital tubes paired, the 

 anterior branch vestigial, both reflexed. No caudal gland or 

 spinneret. 



Hab. Mud. 



Genotype : A. elegans Micoletzky, 1917. 



Micoletzky, 1917, Zool. Jahrb., Syst.,x\., 516; 1922, Arch. f. 

 Naturg., Abt. A, Ixxxvii, 244. 



29. Bolbonema Cobb, 1920. 



Cuticle finely striated, with bristles. Lateral alae absent. 

 Head somewhat wider than neck. Lips indistinct. Lateral 

 organs spiral. Buccal capsule short and narrow. Oesophagus 

 cylindrical, with pyriform posterior bulb. Male unknown. 

 Tail of female conical. Female genital tubes paired, opposed, 

 reflexed. Caudal glands and spinneret present. 



Hab. Marine (in mud). 



Genotj^e : B. brevicolle Cobb, 1920. 



Cobb, 1920, Contr. Sci. NematoL, ix, 264 and key. 



Subfam. 3. BUNONEMINAE Micoletzky, 1922. 



Free-living forms. Body plump, with dorsal or lateral pairs 

 of " warts " or crusty prominences, which are asjonmetrical. 

 Cuticle usually with lateral alae. Lateral organs inconspicu- 

 ous. Head retractile, with large bristles and lamellae. Buccal 

 cavity three-sided. Tail of male with rudimentary " bursa " 



