IQ6 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Body of nearly uniform width throughout and not constricted 

 at the articulations; head longer than wide, anterior portion 

 narrower than posterior ; first free thoracic segment the shortest ; 

 the two following ones subequal but not as long as the two suc- 

 ceeding segments, the last is shorter than the third. Abdomen 

 composed of six segments of which the five anterior ones are 

 subequal and somewhat broader than the thorax; last segment 

 triangular, with rounded apex. 



Eyes large, compound, supported on peduncles. 



First antennae in female shorter than head, composed of three 

 segments of which the first is longer than the second and third 

 together, and the third is slightly longer than the second. In the 

 male the first antennae are about two-thirds the length of' the 

 body and are composed of about eleven joints of which the first 

 is one-third as long as the whole appendage and curved some- 

 what ventrally. Second antennae in both sexes short, not reach- 

 ing as far as apex of first joint of first pair, slender, curved 

 downwards, terminated by a tuft of setae. 



First pair of legs in male much larger and more elongated 

 than in female; carpus elongate and cylindrical, extending about 

 one-half its length beyond the head; propodus robust and with a 

 strong curved digital process with two teeth, near the second 

 one of which are two stout setae ; dactyl curved and provided on 

 inner margin with about seven short setae originating at the 

 bases of as many serrations. In the female, the first pair of legs 

 extends but little beyond the head ; propodus with a stout, digital 

 process which is broadly notched near the base and is elevated 

 into a slightly serrated lobe and bears at its apex a short, stout, 

 terminal tooth. 



Second pair of legs, like all the following, ambulatory; second 

 pair with dactyl more elongated than in succeeding legs, but 

 shorter than propodus. Third and fourth pairs of legs shorter 

 than second. Last three pairs with basal joints expanded and 

 dactyls short. 



Uropods consisting of a robust peduncle and two rami, of 

 which the outer one is very small and uniarticulate, and the 

 inner one is six- jointed, tapering from the base, with the segments 

 of equal length and provided with setae near their distal ends. 



Pleopods five pairs. 



Length 2 mm. 



