250 APPENDIX TO NEMATODA 



and bending towards the ventral surface near the tail. Head 

 truncate, without recognizable lips or papillae. Oesophagus 

 slender, with a large, oblong, glandular posterior bulb, con- 

 nected with the intestine by a narrow neck containing some 

 kind of valves. Intestine modified into a fat-body. Anus 

 absent. Tail of male blunt, strongly curled ventrally. 

 Caudal papillae apparently absent. Two equal spicules 

 present, broad at the base and bent outwards at right angles 

 in the middle, with their tips deeply bifurcate. An accessory 

 piece present, with a triangular dorsal portion and two lateral 

 processes. Vulva near the anterior end of the body. No 

 muscular vagina. A single functional uterine branch, with 

 ovary, present, running posteriorly. A blind sac, lying 

 parallel to the anterior portion of this, and acting as an 

 egg-reservoir, probably represents the second uterine branch. 

 Eggs oval, with thin shell, containing a crescentic embryo 

 in utero. 



Hab. Body-cavity of an Earthworm (Perionyx). 

 Genotype : 8. lumbricicola Baylis & Daubney, 1922. 



Baylis & Daubney, 1922, Mem. hid. Mus., vii, 338. 



The affinities of this curious genus are at present impossible 

 to determine. It appears to have no close relationship with 

 the parasites of earthworms which have been referred to the 

 family Drilonemidae {supra, p. 240). 



29. Stenodes Dujardin, 1845. 



Slender, elongate worms. Cuticle finely striated. Two 

 slight lateral alae present. Head small, distinct, truncate, 

 followed by a narrower neck. An imperfect buccal capsule or 

 horny disc present, in the middle of which is the circular 

 mouth. Oesophagus club-shaped, followed by a distinct 

 " ventriculus." Tail of male pointed, curled. Two long, 

 equal spicules present. Two pairs of small preanal " suckers " 

 [ ? large papillae] present. Tail of female straight, acute. 

 Vulva at anterior third of body. A single uterus present. 

 Oviparous. Eggs with reticulate or alveolate shell, and 

 containing embryos when laid. 



Hab. Unknow^l — presumed to have been parasitic in a 

 foreign Mammal which had been kept in captivity in Paris. 

 Genotype : 8. acus Dujardin, 1845. 



Dujardin, 1845, Hist. nat. des Helminthes, Paris, 264. 



30. Uracanthus Diesing, 1861. 



Uracmithus brevispinosus Diesing, 1861, is Leidy's " Nema- 

 toideum cavitatis abdominis Passali cornuti " renamed. The 

 worm described by Leidy was a larval form found in the body- 



