STUDIES OX THE ECTOPAKASITIC TREMATODES OP JAPAN. 261 



1.5 mm. long; with one side of the caudal 

 disc malting with the corresponding side of the 

 body a less acute angle than in A aberruns ; 

 caudal disc with about 8G suckers on one side 

 and only 6 on the other ; genital atrium with 

 a cup-shaped organ, the internal surface of 

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



