PARASITES'OP ELEPHANTS, 



271 



Internal leaf-croivn. — This is placed over the top of the 

 chitinous ring of tlie mouth capsule. It consists of 36 very short 

 leaflets corresponding to those of the external crown. 



(Esojyhagecd funnel. — This is large and characteristic of the 

 genus. It ends at the level of the nerve-ring where the oesophagus 

 is constricted. There are three chitinous plates lining this 

 funnel as well as the rest of the oesophagus. The cavity of 

 the funnel is -21 mm. in leiigth and -175 mm. maximum diameter, 



(Esophagus is short and thick. It is bulbous at either end and 

 constricted whex^e the nerve collar is placed. The total length of 

 the oesophagus is "6 mm. ; the anterior portion is "21 mm. and 

 the posterior '39 mm. The diameter of the anterior portion is 

 •25 mm., while the posterior is '22 mm. The posterior end of the 



Text-fia-ure 70. 



Amira sameera. sp. ii. Dorsal view of bursa. 



oesophagus projects into the beginning of the chyle intestine, 

 forming three small lobes. 



Chyle intestine. — The course taken by the chyle intestine is. 

 practically straight. Its wall is thick and the cells are not 

 pigmented . 



Excretory system. — The excretory pore is placed -7 mm. from 

 the head end. The thin-walled excretory vesicle lies close by 

 and has a thin wall. 



Nervous system. — The nerve collar is -33 mm. from the head 

 end. It lies in the deep constriction of the oesophagus. 



Genital organs. — The convolutions of the testes reach to within 

 1-3 mm. of the head. They run for the most part in the axis of 

 the body. The cement gland is nearly half the length of the 



