No. 26.] ARTHROSTRACA OF CONNECTICUT. 65 



First antennae of female slightly longer than peduncle of 

 second pair and nearly half as long as body ; first joint of peduncle 

 rather stout ; flagellum about three times as long as peduncle, with 

 fascicles of slender setae ; flagellum in male extremely slender and 

 provided with very fine hairs. Second antennae in female half 

 again as long as the first pair, last two joints of peduncle not 

 greatly elongated, subequal; in the male exceeding the length of 

 body and with last joint of peduncle rather longer than preceding 

 one. 



First gnathopods with propodus nearly as long as carpus and 

 somewhat bulging on proximal portion of posterior margin. 

 Second gnathopods very slender, the narrow carpus nearly twice 

 as long as propodus. 



First and second pereiopods with dactyls about as long as pre- 

 ceding two joints combined. Last pair with ischium nearly twice 

 as long as wide, much longer than the nearly square merus; 

 carpus subrectangular, elongated ; propodus longer than carpus 

 or dactyl. 



Postero-lateral angle of third abdominal segment not pro- 

 duced, forming nearly a right angle ; fourth abdominal segment 

 of male with a prominent dorsal carina which ends abruptly 

 posteriorly ; following segment deeply indented above ; the cor- 

 responding features in the female are much less pronounced. 



Second uropods with no long terminal spine on outer ramus. 

 Terminal uropods thickly setose in the male but nearly devoid of 

 setae in female., 



Telson very narrow and nearly smooth, excepting for three 

 small marginal spinules near tip of each terminal lobe. 



Color whitish, with a rose-colored or light-purplish spot in 

 first coxal plate, and a few other spots of same color on other 

 parts of the body. 



Length 14 mm. 



Distribution : Norway, North Sea, France ; Woods Hole, 

 Massachusetts ; Newport, Rhode Island ; off New London, Con- 

 necticut ; Fisher's Island Sound, off Stonington, Noank, off Sea 

 Flower Key, off Saybrook (Smith), Savin Rock (near New 

 Haven), Long Island Sound. 



The species is quite abundant, being very common on sandy, 

 gravelly, and muddy bottoms, and among eel-grass (Smith). 

 It occurs at depths up to 10-12 fathoms. 



