U. S. NATIONAL MUSEUM 



BULLETIN 166 PLATE 31 



Species of Corycodus. Cymopolus. Cymonomus, and Ethusina. 



1, Corycodus buUatus, female (180!;i). X '.i. ventral view; 2, Cymopolus agassizii, male (18682), X 3, ventral 

 view; 3, Cymonomus quadratus, male (68094), X 3, ventral view; 4, Ethusina gracilipes, female (20633), 

 X 2, ventral view. 



