H. A. Baylis 
423 
and two ventral) and a pair of large papillae, probably double, close behind and 
at the sides of the cloacal aperture. Preanal papillae at least 50 pairs. Vulva 
slightly in front of the middle of the body, in an annular constriction which is 
usually plainly visible to the naked eye. Vagina simple, muscular, about 
4 mm. long in a 150 mm. specimen, passing into an undivided portion of the 
uterus, which gradually widens and, after a course of about another 4 mm., 
gives off six wide, thin-walled branches running back nearly straight for a 
distance of about 24 mm. These are followed by short, narrow, muscular canals, 
describing an S-shaped curve, and separated from the ovarian tubes by small 
oval swellings. The coils of the ovarian tubes extend backward nearly as far as 
the anus, and forward to the level of the vulva. In smaller specimens the 
measurements given for the female organs are, of course, proportionately 
smaller. Ova roundish-oval in shape, measuring 0-095-0-1 mm. x 0-0875- 
0*0925 mm. 1 , with shell 0-0075 mm. thick. 
Hosts: Naja haje , N. nigricollis, Bitis arietans , Pseudaspis cana , Crotalus 
sp.? 
Geographical Kange : Africa, ? Brazil. 
Fig. 6. Polydelphis boddaertii. Dorsal lip, viewed from the exterior. 
2. Polydelphis boddaertii (Baird, 1860). 
Ascaris boddaertii Baird (1860), p. 447. 
„ „ Baird (1861), p. 229. # 
„ „ Orley (1882), p. 310. 
„ „ Stossich (1896), p. 78. 
Polydelphis boddaertii Baylis (1916), p. 416. 
Length (female) 90 mm. Lips quadrangular, broader than long. Dorsal 
lip (Fig. 6) with two simple papillae; ventro-lateral lips each with one papilla. 
Pulp sends out radiating processes in front (vaguely-defined in the type- 
specimen), apparently from two main lobes on each side of the lip, the outer 
lobes being larger than the inner, as in P. quadricornis . Dentigerous ridges not 
seen. Oesophagus 4 mm. long. No intestinal caecum. Tail 0-4 mm. long, blunt, 
apparently without terminal spike. Vulva behind middle of body, dividing it 
in the proportion of 5 : 4. Vagina, together with undivided portion of uterus, 
1 0 064 mm. x 0-054 mm., according to Wedl. 
