NEMATODA IN THE COLOMBO MUSEUM. 9( 



13. — HeUrakis trilabivm., u.sp. 

 PI. I., fig-. ?. 



From the intestine of the jungle crow {CentropuR sinensis, 

 Illig.), Horana. 



Cuticle annulate ; three semi-circular lips at the head end, of 

 which the dorsal lip carries two papillae, the two others one papilla 

 each ; the oesophagus occupies ^^^ of the total length. The male 

 attains a length of 26 mm. and a breadth of 0'69 mm. ; the conical 

 tail is 4V of the body length and carries on each side four large prae- 

 anal and six post-anal papillae. One pair of the latter occupies a 

 sub-median position close behind the cloaca. In front of the latter 

 there is a circular sucker. The cloacal aperture is triangular : the 

 long sub-equal spicula measui'e respectively 1-95 and 1*97 mm. ; 

 their hinder end is rounded. 



The female (39 mm. by I'll mm.) has a conical attenuated tail 

 ^V of total length, with small digitate prolongation ; the vulva 

 lies behind the mid-body, dividing the body in the proportion of 

 8:5; the thick-shelled smooth eggs are 0*081 mm. by O'O-tT mm. 

 broad. 



14. — Heierakis anomala^ n.sp. 

 PL I., figs. 10, 11. 



From the stomach of Tropidonoius piscator, Schneider (*' dia 

 polonga," Sinh.), Colombo. 



Cuticle annulate ; head with three elongate, sinuate lips : at their 

 base the cuticle is swollen, and presents transverse rings with 

 distinct posterior margins ; the oesophagus equals ^ to J the total 

 length. 



The male measures 34 mm. by Til mm. ; the caudal end is 

 pointed and occupies ^V of the body length ; on each side there 

 are three prae-anal and four post-anal papillae ; of the latter one pair 

 lies close behind the cloacal orifice, and the next two pairs of lateral 

 papillae are remarkably large and touch one another ; the sub- 

 equal spicula are granulated and measure 1*70 and 1*75 mm ; the 

 sucker-like organ is beset with eight roundishprojections, of which 

 the cuticle shows pore canals. 



The female is 33 mm. long by 1-14 mm. broad : the finely 

 pointed tail is ^^ of the body length ; the vulva opens at two- 

 thirds of the length from the head end ; the thin-shelled eggs 

 measure 0'055 mm. by 0*036 mm. 



Strongylus. 

 Body slender ; the musculature is of the type of Schneider's 

 Meromyaria, consisting of long rhombs generally arranged in six 

 longitudinal rows ; the genus belongs to the Secernentes ; male 



