424 
Classification of the Ascaridae 
about 7 mm. long, running posteriorly, and ending in an oval uterine chamber 
which gives off, laterally and posteriorly, six wide branches. These follow a 
sinuous course, parallel to each other, to within about 13 mm. from the 
posterior end of the body. The ovarian tubes turn forward shortly after their 
origin, and their coils extend anteriorly for a short distance in front of the vulva. 
Male unknown. Ova roundish-oval, measuring 0-088-0-095 mm. x 0-075- 
0-080 mm., with shell about 0-007 mm. thick. 
Host: Drymobius boddaertii. 
Locality: West Indies. 
3. Polydelphis hexametra (Gedoelst, 1916). 
AscaHs hexametra Gedoelst (1916), p. 9. 
Length, male, 51-55 mm.; female, 68-5-85 mm. Thickness, male, 1-3 mm.; 
female, 1-45 mm. Cuticular stnation very fine, visible only under high powers 
Body cylindrical, equally tapering at both ends. Lips sub-equal. Dorsal lip 
trapezoidal, with anterior angles rounded, bearing two lateral papillae. 
A entro-lateral lips each with one papilla. Pulp undivided. Dentigerous ridges 
minute. Oesophagus 22 1° 20 of total body-length. No intestinal caecum. 
Nerve-ring in anterior fifth or quarter of oesophagus. Excretory pore at 
0-83-0-85 mm., and a pair of sessile cervical papillae at 0-975 mm., from the 
anterior extremity. Tail short, blunt, with small terminal spike. Tail of male 
with six pairs of postanal papillae—two pairs at about the anterior third of the 
tail (the more anterior of these sub-median); two large pairs at about f of the 
length of the tail; one very small, sub-median pair and one larger, lateral pair 
a little in front of the tail-spike. Spicules unequal, measuring 0-91 mm. and 
0-83 mm. in length, with rounded tips. Coils of male genital tube do not extend 
anteriorly beyond the middle of the body. Tail of female straight, ~ of the 
body-length. Vulva in front of the middle of the body. Vagina, together with 
undivided portion of uterus, about 2-76 mm. long. Uterus gives off six branches 
14 mm. long, continued as narrow muscular tubes, 0-4-0-45 mm. long, which 
pass into the oviducts. Most of the coils of the ovarian tubes extend backward 
to the posterior ^ of the body, a few folds reaching forward to 1-9 mm. in 
front of the vulva. Ova nearly spherical, mean measurements 0-08 mm. x 
0-072 mm. Shell thick, with smooth [?] surface. 
Host: Chamaeleon dilepis. 
Locality: Belgian Congo. 
4. Polydelphis waterstoni, sp.n. 
Length (female) up to 110 mm. Thickness, 1-45 mm. Cuticular striation 
not apparent. Body slender, more tapering in front than behind. Diameter of 
head 0-3 mm. Lips rather broader than long, widest at the base, somewhat 
