44 ASCAROIDEA 



apparently six small indistinct lips, each with at least one 

 papilla, and constricted oS from the body. Buccal capsule 

 prismoid, one-half to two-thirds as wide as long. Oesophagus 

 with slight prebulbar swelling and ovoid posterior bulb, 

 separated by a distinct constriction. Spinneret absent. Tail 

 of male tapering, with three pairs of subventral papillae (one 

 large pair preanal, two small pairs postanal). A single slender, 

 pointed spicule. A small accessory piece doubtfully present. 

 Testis single, reflexed. Tail of female stout at the base, 

 conical posteriorly. Vulva very prominent, in front of oeso- 

 phageal bulb. Vagina muscular. A single, posterior, uterus 

 present, with two posterior, doubly reflexed ovaries. Eggs 

 with the less pointed end, which is directed away from the 

 vulva, " saddled " with a peculiar organ. 



Hab. Rectum of a Cockroach [Polyzostaria). Australia. 

 Genot3rpe : P. aureus Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol, ix, 256 and key. 



14. Blattophila Cobb, 1920. 



Cuticle with plain transverse striations, without alae or 

 bristles. Lateral organs absent. Head rounded, with very 

 small lips forming almost an annular elevation. Buccal 

 capsule very short, prismoid, about half as wide as long, with 

 apophyses springing from its base, a dorsal one predominating, 

 the whole contained in a small, spherical pharyngeal bulb. 

 Oesophagus with club-shaped prebulbar swelling and distinct 

 posterior bulb. Tail conical, pointed, without spinneret. 

 Anterior lip of anus prominent. In the male two large sub- 

 median preanal papillae and two smaller postanal papillae 

 present. Spicules rudimentary. A single testis, reflexed. 

 Vulva not prominent, in the anterior third of the body. Ovaries 

 paired, parallel, posterior and reflexed. Eggs numerous, 

 elongated and ellipsoidal ; may be segmenting when laid. 



Hab. Intestine of a Cockroach (Panesthia). Australia. 

 Genotype : B. sphaerolaima Cobb, 1920. 



Cobb, 1920, Contr. Sci. Nematol, ix, 271 and key. 



15. Cephalobium Cobb, 1920. 



Cuticle with fine transverse striations. Lateral alae present. 

 Lateral organs absent. Lateral fields each contain abovit 

 thirteen pores, of which the posterior pair is on the tail. Head 

 with six bristle-like papillae. Buccal capsule composed of two 

 portions and with a large, complex " glottoid organ " at its 

 base. Oesophagus with a pronounced prebulbar swelling, 

 in front of the nerve-ring, and a very slight posterior bulbous 

 swelling. Tail conical, without spinneret. In the male 

 one pair of preanal papillae and five pairs of postanal papillae 



