124 ASCAROIDEA 



dierk. Vereen., Leiden, (2) x, 239; 1907, Mem. Soc. Zool. 

 France, xx, 74. 



de Man (1907) has proposed the subgenera Eulinhomoeus 

 and Paralinhomoetis. In the former the tail is cylindrical 

 and the pharynx is armed with teeth (type : elongatus Bastian, 

 1865). In the latter the tail is attenuated and the pharynx 

 unarmed (type : lepturus de Man, 1907). 



31. Metalinhomoeus de Man, 1907. 



According to de Man, this genus closely resembles his 

 subgenus Paralinhomoeus of Linhomoeus. It is to be dis- 

 tinguished by the fact that the oesophagus terminates in a 

 bulb with a valvular apparatus. 



Hab. Marine. 



Genotype : M. typicus de Man, 1907. 



de Man, 1907, Tijdschr. Nederl. dierk. Vereen., Leiden, 

 (2) X, 241 ; 1907, Mem. Soc. Zool. France, xx, 81. 



32. Cothonolaimus Ditlevsen, 1919. 



Syn. Macrolaimus Ditlevsen, 1919, nee Maupas, 1900. 



Cuticle thin, unstriated. Head with two crowns of bristles, 

 six small in the anterior crown and four stout and twice as 

 long in the posterior. Lateral organs incipient spirals. 

 Buccal capsule very large, thin-walled, constricted trans- 

 versely into two parts, the anterior larger and funnel-shaped, 

 with minute teeth at its base, the posterior globular, with 

 still smaller teeth in its middle. Oesophagus almost cylin- 

 drical throughout. Spicules rather slender. Accessory piece 

 large and dark-coloured, with two long and slender posterior 

 processes. Testis single. Female genital tubes paired, 

 ojiposed, refiexed. Caudal glands present. 



Hab. Marine. 



Genotype : C. [Macrolaimus] inermis (Ditlevsen, 1919) 

 (by page precedence). 



Ditlevsen, 1919, Vid. Medd. Naturh. Foren., Copenhagen, 

 Ixx, 188, 299. 



33. Comesoma Bastian, 1865. 



Syn. Sabatieria de Rouville, 1903 ; Parasabatieria de Man, 

 1907. 



Cuticle finely striated, apparently without bristles except 

 towards the extremities. Head more or less distinct, truncate, 

 without apparent lips, but with papillae and two crowns of 

 bristles. Lateral organs spiral or circular. Pharynx very 

 small, typically three-sided, with a dorsal and two subventral 

 teeth at its base. Oesophagus somewhat swollen posteriorly, 



