STUDIES OX THE ECTOPARASITIC TKEMATODES OF JAPAN. 



261 



1.5 mm. hug; witli one side of the caudal 

 disc making ^vitli the corresponding .side of the 

 body a less acute angle than in A aherrans ; 

 caudal disc with about 30 suckers on one side 

 and only G on the other ; genital atrium with 

 a cup-shaped organ, the internal .surface of 

 which is covered with straight conical sphies...A. triangularis, p. 200. 



