462 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 88 



first anfenna 

 seconc^ antenna 



preora/ sfing 

 sue f ion cup 

 resp/rafory areas 



second max/ //a 



probosc/'s 

 basa/ p/afe 

 fhorac/c appendage 



nafafory /obe 



fesfes 

 abdomen 



anferior hook 

 Jlrsf anfenna 



PiGUEB 21.— o, Argulus japonicus, male, ventral view ; 6, same, dorsal view ; c, antennae 



of Argulus pugettensis. 



