PARASITES OF ELEPHANTS. 



213 



slightly anterior to the other. Of the other two, one is placed 

 on either side of the body at the same level. 



The female tail is short and conical, unlike that of L. leipert 

 Its tip is pointed. It is -53 mm. long, 

 raised or surrounded by prominent lips, 

 four papillae. 



Text-fiffure 7, 



The anal opening is not 

 On either side there are 



Leiperenia galebi Klialil. Tail end of female. 



Embryos.— The uterus is crowded with these giant embryos. 

 They attain '48 mm. in length. The various parts of the 

 digestive tract can be easily made out in them. 



Habitat. Intestine of Indian elephant (India; died in the 

 London Zoological Gardens). 



Discussion. 



This genus has some points in common with the genus Atractis. 

 The latter was made by Dujardin to include Ascaris dactyUris of 

 Rudolphi, 1819, but was not defined. The genus was defined by 

 von Linstow in 1902. From von Linstow's description, together 

 with a detailed account of the type-species by Railliet and Henry, 

 Leiperenia can be easily separated by the following characters :— 



In Atractis there are six lips surrounding the mouth. There 

 are no cuticular membranous expansions in the anterior part of the 

 body. The oesophagus is divided into two portions, of which the 

 anterior is the longer. The number of the conical processes is 

 limited to six. There is a cuticular expansion along the posterior 

 two-thirds of the body. The species of Atractis are parasitic in 

 Land and Freshwater Tortoises and Reptilia. 



