ART. 6 NEW FORMS OF NEMATODE WORMS CHANDLER 7 



the end of the tail. (Fis. 8.) The bursahke structure (fig. 9) is about 

 230m long and 220m wide. The cloaca is situated slightly to the right 

 of the posterior end of the body. The pedunculated preanal papillae 

 are asymmetrical. On the right side there are three consecutively 

 larger papillae situated near the junction of the right ala with the 

 body; posterior to these there are two lartre papillae more ventrally 

 situated, then a very short ventrally placed papilla, and finally, in the 

 right ala just anterior to the cloaca, is another long papilla. At 

 the posterior extremity, to the left of the cloaca, is a group of three 

 sessile papillae, one larger than the other two. In the left ala only 

 three papillae could be observed, two situated near the junction of the 

 anterior end of the ala with the body, and one near the middle of the 

 ala. The spicules are very unequal; the right one is about 2.75 mm. 

 long with a nearly uniform diameter of about 42m. Its tip is flattened 

 and very slightly expanded, ending in a sharp, curved point. The 

 small left spicule is curved, its sides rolled over to form a partially 

 closed tube; it measures about 420m in length with a diameter, before 

 its slight expansion at the proximal end, about the same as that of 

 the longer spicule. 



Female. — The females are \ei'y large and measure 220 mm. or 

 more in length, with a diameter of about 2 mm. The anterior part 

 of the esophagus is about 550m to 570m in length with a diameter of 

 about 220m. The posterior part is about 520m in diameter; its 

 length could not be determined on account of the thickness of the 

 worms. The vulva opens by a transverse slitlike aperture about 

 850m from the anterior end. The tail is bluntly rounded, but slightly 

 smaller in diameter than the head. The anus is at the posterior 

 extremity. The eggs measure from 50m to 52m by 33m to 34m; they 

 have a thick shell, further thickened into a collar near each end, the 

 ends being covered by thin opercula; they contain developed embryos 

 while still in the uteri. 



Host. — Varanus flavescens. 



Location. — Under lining of peritoneum. 



Locality. — Calcutta Zoological Garden, Calcutta, India. 



Type specimens. — United States Natural Museum Helminthological 

 Collection No. 8009; paratypes No. 8010. 



This worm was found in three of six specimens of the above host. 

 The worms were lying just under the serous membrane lining the 

 peritoneal cavity, their bodies being thrown into rather regular waves. 

 The method of escape of the eggs from the body was not determined* 

 and nothing is known of the Ufe cycle. 



Although the complicated epaulettelike structures and oral pa- 

 pillae described by Skrjabin in his species, H. varani, which is the type 

 species of the genus, are not developed in this species, there can be 



