74 ASCAROIDEA 



9. Brachyneraa Cobb, 1893, nee Fieb., 1861.* 



The tjrpe of this genus (which is based on a single immature 

 specimen) appears to have possessed very generalized larval 

 characters, and may possibly have belonged to some genus 

 of Anguillulinidae whose adult characters are better known. 

 In general it approaches perhaps most nearly to T ylencholaimus , 

 but it is impossible to assign it definitely to this or to any 

 other genus. 



Hab. Soil. 



Genotype : B. obtusa Cobb, 1893. 



Cobb, 1893, Agric. Gaz. N.S.W., iv, 811. 



10. Tylencholaimellus M. V. Cobb, 1915. 



Cuticle very finely transversely striated, and with longi- 

 tudinal striations, without bristles. Head not distinct, with 

 six low papillae, and apparently also less conspicuous cir- 

 cumoral papillae. No cephalic bristles. Stylet short, obliquely 

 truncate anteriorly, with stouter posterior portion, knobbed 

 at its base. A separate chitinoid piece, directed slightly 

 outwards, lies dorsally to the stylet. Oesophagus with an 

 elongate posterior bulb. Caudal end of male with two preanal 

 papillae. No postanal papillae or bristles. Spicules slender. 

 No accessory piece. Testes paired, opposed, outstretched. 

 Female unknown. 



Hab. Fresh water. 



Genotype : T. dijjlodonis M. V. Cobb, 1915. 



M. V. Cobb, 1915, Trans. Amer. Micr. Soc, xxxiv, 28; 

 Micoletzky, 1922, Arch. f. Naturg., Abt. A, Ixxxvii, 431. 



11. Tylolaimophorus de Man, 1880. 



Cuticle with fine transverse striations, without alae or 

 bristles. Head not distinct, rounded, without bristles, but 

 with a crown of small rod-like circumoral papillae and a second 

 crown of conical papillae. Lateral organs transversely oval, 

 situated far forward. Stylet consists of three rods, joined 

 anteriorly and with a chitinoid cap apparently composed of 

 three short, curved rods. Oesophagus narrow, non-muscular, 

 with bulb-like posterior sweUing. Intestine with a postanal 

 caecum. Male unknowni. Female genital tubes paired, 

 opposed, outstretched. Caudal glands absent. 



Hab. Sandy soil. 



Genotype : T. tijpicus de Man, 1880. 



* Although the name Brachynema is preoccupied, this genus seems 

 of such doubtful validity that we refrain from renaming it. 



