210 



DR. M. KTIALIL OX THE NEMATODE 



diameter. The pharynx, at.sophagu.s, and a .straight gut can be 

 easily recognized in them. 



llahitnt. The intestine of the African elephant (Uganda). 



Text-fi"ure 4. 



Leiperenia leiijeri Khnlil. Tail end of female. 



Leiperenia galebi Khalil, 1922. (Text-figs. 5-7.) 



Material. — The material consisted of ten specimens collected 

 by Prof. Leiper from an Indian elephant that died in the London 

 Zoological Society's Gardens. They were the only Helminth 

 parasites found in that elephant. 



Shape ofhody. — These nematodes are just visible to the naked 

 eye. The male is smaller than the female. It is 3'25 mm. 

 long, while the female is 3"8 mm. The maximum diameter is 

 attained near the middle of the body. It is '17 mm. in the 

 male and -18 mm. in the female. The head end is truncated, 

 while the caudal is attenuated to a fine end, more delicate in 

 the female than in the male. The caudal end of the male is 

 crn-ved ventrally. The head end of the body has a lateral 

 cuticular expansion on either side. 



Skin. — The cuticle is striated throughout its length, except for 

 a short distance at the cephalic extremity. The striations are at 

 regular distances of -008 mm. apart. The cuticle is expanded in 

 a membranous fashion on either side of the cephalic end of the 

 body for a di.stance of -6 mm. It is striated in its greater extent, 

 the part corresjjonding in level with the pharynx is not striated. 

 The cuticular expansion is -023 mm. in breadth. 



Mouth collar. — The mouth collar is distinctly separated from 



