ISO 



CONNECTICUT GEOL. AND NAT. HIST. SURVEY, 



[Bull. 



Fig. 44. AmphitJwe riihricata. 



First antennae usually more than half as long as body; first 

 and second peduncular joints subequal and each one twice as 

 long as the last one ; flagellum slender and longer than peduncle. 

 Second antennae decidedly stout, shorter than the first in female, 

 relatively longer in the male ; last joint of peduncle as long as pre- 

 cedmg; flagellum short and thick, composed of few joints, and 

 often less than half as long as peduncle. 



Coxal plate of first gnathopod produced bluntly forward- 

 first five deeper than their respective segments; fourth pair not 

 excavate behmd; fifth pair with broad front lobe as deep as 

 preceding. 



First gnathopods in the male stout, with basal joint short 

 and produced mto a prominent lobe at antero-distal angle- pro- 

 podus oblong with palm oblique and convex and with posterior 

 angle rounded and armed with a spine. Second gnathopods with 

 broad basal jomt with distal lobe smaller than in first pair- pro- 

 podus stout and provided with a tuft of setee at the apex, palm 

 obhque, con^^x toward apex, concave toward prehensile angle 

 which IS produced. In the female, first gnathopods with carpus 



