1922.] 



H. A. Baylts and R. Paubney : Parasitic Nematodes. 



127 



tapering, and measures only about 0*14 mm. in length. There is a yellow chitinoid 

 accessory piece, more or less triangular in shape and measuring about 0*025 mm. in 

 length. 



In the female the tail is relatively 

 long (o^-O'ô mm.), and gradually taper- 

 ing, with the exception of a slight thicken- 

 ing just before the conical tip. No caudal 

 papillae were seen. The general arrange- 

 ment of the genital organs is that seen in 

 Camallanns, but the prominent lips of the 

 vulva are here modified into a tubular 

 appendage (fig. 63,) somewhat flattened 

 dorso-ventrally and projecting freely 

 from the body-wall in a posterior direction 

 to a distance of 03-0 '4 mm. This ap- 

 pendage originates at a point a little 

 behind the anterior third of the length 

 of the worm (at 5 - 9-6*i mm. from the 

 head-end). The vulvar aperture is situat- 

 ed on the ventral surface of this struc- 

 ture, near its extremity. The muscular 

 vagina runs from the opening to the base 

 of the appendage, and then turns back 

 just within the ventral body-wall, running 

 straight back for about 2 mm. before opening into the uterus. The posterior branch 

 of the uterus is, as in Camallanus, without an ovary. The worm is viviparous, both 



branches of the uterus, in mature females, 

 being filled from end to end with free 

 embryos. 



We have considered it necessary to 

 make this form the type of a new genus, 

 on account of the following important 

 characters in which it differs from Camal- 

 lanus : — 



(1) The structure of the chitinous 

 v. buccal valves, each of which 



has two large thickenings, 

 giving the appearance of 

 two separate masses of 

 chitin. 



(2) The reduction of the " tri- 

 dents " to simple, rod-like 

 structures. 



Fig. 62. — Camallanides prashadi. Posterior end 

 of male ; lateral view. 



a. p., accessory piece; I., left spicule; r., right 

 spicule. 



f 



Go 



L 



Fig. 63. 



of female: 



-Camallanides prashadi. 

 lateral view. 



Vulvar region 



i., intestine; v., vulva. Uterus, full of embryos, 

 omitted. The arrow points in the direction of the 

 head. 



