9O CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



First antennae nearly as long as second; first joint of peduncle 

 much stouter and a little longer than second; third joint small, 

 less than half the length of second ; flagellum consisting of about 

 eighteen elongated segments. Second antennae nearly half as 

 long as body with last two joints of peduncle of nearly equal 

 length. 



First gnathopods consisting simply of a rudiment of the coxal 

 plate and basal joint, of which the former is very small and the 

 latter is curved and rounded distally where it is provided with a 

 few curved setae. Second gnathopods slender; carpus with a 

 large, triangular posterior lobe ; propodus with oblique palm, only 

 slightly curved and minutely denticulated ; dactyl with four spini- 

 form projections on inner margin behind tip. Second, third, and 

 fourth coxal plates about as deep as their respective segments ; 

 that of second pereiopod broader than deep and deeply excavated 

 at upper posterior margin; the three posterior pereiopods in- 

 creasing successively in length; basal joints broad; last pair con- 

 siderably longer than preceding. 



Posterior margin of third abdominal segment with several 

 upturned teeth above the rounded postero-lateral angle. 



First two pairs of uropods with styliform rami, and outer 

 ramus considerably shorter than inner ; second pair not extending 

 nearly so far backward as first or third ; third uropods with rami 

 flattened, lanceolate, over twice the length of the peduncle, 

 margins of each with short spines and setae. Telson deeply cleft. 



Length 5 mm. 



Distribution : Woods Hole, Massachusetts ; Long Island 

 Sound. Dredged at depths of 6 to 25 fathoms. 



According to Holmes : " The body and coxal plates in the 

 living specimens were marked with blue or purplish pigment 



spots Sometimes the blue or purplish color of these 



spots is replaced by a reddish brown, and in some specimens 

 neither kind of spots occurs." 



PONTOGENEIID^:. 



Body compressed. Rostrum not prominent. 

 First antennae with peduncle not elongate, accessory flagellum 

 usually wanting, never more than uniarticulate. 

 Mouth parts normal. 



