U. S. NATIONAL MUSEUM 



BULLETIN 166 PLATE 30 



Species of Corycodus. Cymopolus, Cymonomus. and Ethusina. 



1, Corycodus buUatus, female (18061), X 3, dorsal view; 2, Cymopolus agassizii, male (18682), X 3, dorsal view; 

 3, Cymonomus quadratus, male (68094), X 3, dorsal view; 4, Ethusina gracUipes. female (20633), X 2, dorsal 

 view. 



