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



fifth pereiopods increasing in length posteriorly; basal joints not 

 greatly expanded, with front margins provided with short setae. 



Uropods all extending to about the same point ; first pair with 

 subequal rami which are about half as long as peduncle 'and which 

 bear spines apically ; second pair with outer ramus about half as 

 long as inner one, both of which are provided apically with spines ; 

 last pair small, uniramous ; peduncle nearly as broad as long ; 

 ramus rectangular, about twice as long as wide and with apical 

 spines and setae. 



Telson subrectangular, twice as broad as long, tapering 

 slightly toward the entire and slightly arcuate posterior margin 

 which is armed with numerous spinules. 



The length of the largest males, from which the drawings 

 in this paper were made, is about 13 mm. The usual length is 

 only 6-8 mm. 



The sexual differences are not great. 



According to Smith, in all the females and most of the males 

 of the smaller size mentioned, the first antennae are longer than 

 the second and the flagellum of the first is composed of sixteen to 

 nineteen segments and that of the second pair of only eight to 

 ten. 



The species was originally described from specimens found in 

 wells in Middletown, Connecticut, but specimens have also been 

 found at Canaan, and under stones in a small brook near New 

 Haven. 



Melita Leach. 



Abdominal segments sometimes produced dorsally to denti- 

 form projections. Coxal plates moderate, fourth pair largest 

 and more or less emarginate behind. 



First antennae very slender and much longer than second ; 

 accessory flagellum well developed. 



Mouth parts normal. 



Gnathopods rather unequal, anterior ones being comparatively 

 small, and the posterior ones being often enormously developed 

 in the male. Pereiopods rather elongated, the three posterior 

 pairs increasing successively in length and having the basal joint 

 expanded. 



Last pair of uropods projecting considerably beyond the 

 others, having the rami very unequal, the inner one being very 

 minute. Telson small and cleft almost to base. 



