178 COXXECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



first free thoracic segment equaling in length the three succeeding 

 segments combined. 



Eyes small, round. 



First antennae in female stout, half as long as body; first and 

 third joints of peduncle subequal, second joint longer; flagellum 

 nearly as long as peduncle and composed of about a dozen joints. 

 In male joints of peduncle expanded and finely ciliated on edges. 

 Second antennae longer than peduncle of first ; flagellum composed 

 of two joints and as long as last joint of peduncle. 



First gnathopods with carpus short and forming a rounded 

 lobe bearing setae posteriorly; propodus twice as long as carpus, 

 triangular, with palm occupying whole posterior margin and 

 defined proximally by a projecting angle armed with a spine. 

 Second gnathopods in female attached in front of middle of 

 segment; basal joint with antero-distal angle produced to form 

 a triangular process ; propodus oval, palm defined proximally 

 by a prominent projection with spine and bearing a small tri- 

 angular lobe near distal end. In male second gnathopods with 

 basal joint longer than propodus and attached near posterior end 

 of corresponding segment ; propodus long and slender, oblong in 

 form, palm irregularly indented, having at the middle an acute 

 projection, and in front of projecting angular lobe, the two being 

 separated by a deep sinus. 



Gills large and oval. 



Pereiopods three pairs, stout ; with narrow propodus having 

 palm about two-thirds as long as posterior margin and defined 

 proximally by a projection bearing a spine. 



Length 16 mm. Females always much shorter than males. 



Distribution : European coast south to France ; Greenland and 

 Labrador (Ortmann) ; Casco Bay, Maine; Portsmouth, New 

 Hampshire (Mayer) ; Grand Manan (Holmes) ; ofif Head Harbor 

 to Salem, Massachusetts ; Annisquam ; off Montauk Point 

 (Holmes) ; Noank, Connecticut. 



Caprella geometrica Say. 



1818. Caprella geometrica, Say, Jour. Acad. Nat. Sci. Phila., 

 vol. I, pt. 2, p. 390. 



Body robust and devoid of spines and tubercles ; head with 

 large triangular process projecting anteriorly. 



