314 



A NEW NEMATODE PARASITE OP A LIZARD, 



at the fortieth pair. 'I'he interval between the tips of consecutive spines on the 

 same side is 77 fj. at the beginning of the row, 125 //, at the seventeenth spine, 

 136 yn at the twentieth, and 114 yu, at the fortieth. 



Both the specimens examined are mature females, having uteri crammed with 

 eggs containing well-developed embryos. I'he genital system is situated posterior 

 to the vulva, and almost entirely on the ventral side of the body. The very 



l-ves 



7. Head end viewed from the right side ( x 305) ; 8. The same, ventral view 

 ( X '305) ; 9, The same, dorso-lateral view (■x475): 10. Anterior part of body, 

 viewed from right side (x 47.5) ; 11. Junction of oesophagus and intestine (x 100) ; 

 12. Terminal portion of female genital system ('x 100); 13a. Vulva, side view. 

 13b. Vulva, face view (x 190); 14. Egg from uterus Cx 305); 15. Posterior part 

 of body (x27); 16- Receptaculum seminis ( x 100) ; 17. Caudal extremity of 

 female (x 100). 



a., anus; b., the two branches of the common trunk leading to the uteri; c.t., 

 common trunk; int., intestine; oe., oesophagus; ov., ovary; ovid., oviduct; res., 

 reservoir; r.s., receptaculum seminis; v., vulva; ves., vestibule. 



anterior vulva, 1/9.5 to 1/11 of the body lengfh from the anterior end, is bounded 

 by non-salient lips with serrated margins (Text-figs. 13a, b). It leads into a 

 straight, backwardly-directed vestibule, with thick musculo-cuticular walls, 320 ^ 

 long and 30^ wide (Text-fig. 12). This passes abruptly into a broader tube, 

 55 fj, wide, with walls lined by large epithelial cells, which appears to be of the 



