248 



THE NEMATODE PARASITES OF ELEPUANTS. 



'Termination of the female. — The female tail is 2-3 mm. long. It 

 tapers gradually. Its tip is rounded. 



Ova. — The ova in the terminal part of tJie nteriis are oval in 

 shape, thin-shelled, and contain a morula. They measure 63 yu 

 long and 35 yu, broad. 



Habitat. Intestine of African elephant (Uganda). 



Text-fie-ure 46. 



Quilouia africana Lane. Abnormality in the raj's of the bursa. 



In a male specimen of Q, africana which was otherwise normal, 

 the externo-dorsal ray was completely missing on one side, as 

 is shown in the accompanying camera-lucida drawii^g. This 

 abnormality must be ver}'- rare, and has apparently not been 

 recorded before. 



Discussion. 



As was mentioned before, the identification of any particular 

 species of the genus Quilonia from descriptions only is very 

 difficult. Diagrams representing the head and tail ends are 

 necessary. Q. hrevicauda is easily distinguished on account of 

 its short stumpy tail. For the rest, careful comparison is neces- 

 sary for diagnosis. The important features in this connection 

 are the shape of the head, the external leaf-crown, the dorsal 

 ray of the male bursa, the length of the spicules, the length of 

 female tail, and the distance between the vulva and anus. 



The fact that the external leaf -crown may or may not project 

 above the head divides the genus into two groups. In Q. renniei, 



