I30 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Eyes nearly round, their distance apart slightly greater than 

 their diameter. 



First antennae shorter than second pair; first and second 

 segm'Mits of peduncle subequal in length and slightly longer than 

 third; flagellum about twice as long as peduncle and made up 

 of seven to nine joints. Second antennae half as long as the body ; 

 peduncle exceeding that of the first pair; last two joints elongated 

 and subequal ; flagellum usually only slightly longer than that of 

 first pair. 



First gnathopods in the male with carpus longer than pro- 

 podus and having a rounded lobe posteriorly densely setose ; pro- 

 podus more than half as long as wide, subrectangular, provided 

 with a group of short cilia near the distal end of front margin 

 and a fascicle of long ones at the apex ; palm nearly trans- 

 verse, slightly sinuous "and provided with a prehensile spine; 

 dactyl strongly curved and shorter than palm. Second gnatho- 

 pods in the male with enormous oval propodus; carpus short, 

 with a long, slender lobe extending along the posterior margin 

 of propodus which is more than half as broad as long, palm 

 oblique, the middle portion slightly arcuate and provided with a 

 notch near the middle, armed with a submarginal row of spines, 

 prehensile angle prominent, rounded. Second gnathopods of 

 the female elongated, weak ; carpus wider than propodus with 

 small, rounded lobe behind, provided with a group of setae; 

 propodus somewhat curved and broadest distally, more than twice 

 as long as broad, posterior margin prolonged to form a chela with 

 the dactyl, which is shorter than the palm and not strongly 

 curved. Posterior margin of basal joints of last three pereiopods 

 serrate. 



Posteroylateral angles of third abdominal segment produced 

 slightly to form a triangular tooth; first two or three segments 

 usually produced dorsally to form a well marked posterior tooth 

 on the middle line. 



First uropods almost twice as long as the second pair. Ter- 

 minal pair very short, not exceeding the peduncle of the second 

 pair in length; peduncle very short, nearly as broad as long, 

 furnished distally with a few seta? ; ramus tapering, as long as 

 peduncle, with a few setae at apex. Telson short, entire, nearly 

 as broad as long and furnished with a slender seta on each side. 



