I/O CONNIiCI-lCUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



with abundant stout setje; dactyl with several serrations near 

 tip on inner margin. Second gnathopods with basal joint very 

 stout; merus elongated on posterior margin and terminating in a 

 rounded apex which bears long setx ; carpus with a rounded lobe 

 behind; propodus oblong oval, twice as long as wide, with 

 numerous fascicles of seta; on front margin, palm long, armed 

 with setse and four spines near the poorly defined prehensile 

 angle ; dactyl with inner margin serrated. First two pairs of 

 pereiopods with basal joints greatly expanded and front and hina 

 margins strongly convex ; merus subcordate in form, with front 

 and hind margins setose; carpus very short; propodus tape?ring, 

 about twice as long as wide ; dactyl straight, slender, and nearly 

 as long as the two preceding joints together. Third and fourth 

 pereiopods with basal joints stout but not greatly expanded; car- 

 pus as broad as long; propodus somewhat curved backward; 

 dactyl stout and strongly curved. Last pair elongated, with 

 oval basal joint provided on front and hind margins with abun- 

 dant long seta;. 



First pair of uropods extending beyond the others ; peduncle 

 cylindrical, and twice as long as outer ramus which is much 

 larger than inner; distal end of peduncle internally -finely ser- 

 rated for a short distance; outer ramus with stout spines on 

 outer margin and a long one apically. Second pair with outer 

 ramus longer than inner but not as long as peduncle. Terminal 

 uropods with a single ramus less than one-half as long as 

 peduncle which is expanded to a rounded lobe distally and 

 medially which bears several setse apically ; ramus as broad as 

 long and with several long setse at the rounded tip. Telson 

 broader than long, transversely elliptical. 



Length 6 mm. 



Distribution : in deep water ofif Vineyard Sound and Buzzards 

 Bay ; Long Island Sound. 



The species inhabits tubes constructed of grains of sand, 

 usually on bottoms of fine compact mud and sand. 



Corophium Latreille. 



Body comparatively stout and much depressed, with extremely 

 small coxal plates; first pair conically produced and tipped by a 



