No. 26.] ARTHROSTRACA OF CONNECTICUT. 93 



armed with a transverse row of small spines. Second gnathopods 

 scarcely longer than the first and of similar structure, except that 

 propodus is more expanded distally. Pereiopods moderately 

 slender and edged with fascicles of small spines; posterior three 

 pairs successively increasing in length and with basal joint 

 rounded, oval in form with posterior margin smooth. 



Last pair of uropods projecting beyond the others; rami more 

 than twice as long as peduncle and edged with small spinules and 

 setae. Telson reaching well beyond the peduncle of last uropods, 

 oblong oval in form, cleft extending beyond the middle and 

 gradually widening toward apex, terminal lobes obtusely pointed. 

 The species is nearly colorless, with scattered purplish spots and 

 the antennae with a few transverse purplish bars. 



Length n mm. 



Distribution : Arctic Ocean, Norway, Halifax, Bay of Fundy 

 to Greenland (Smith), Grand Manan, Vineyard Sound, Long 

 Island Sound, Fishers Island Sound. 



The species is often associated with Calliopius Iceviusculus 

 according to Holmes and is found commonly in tide-pools as well 

 as at the surface. 



GAMMARID^:. 



Body slender. 



Antennse generally slender; accessory flagellum often greatly 

 developed, but sometimes wanting. 



Mouth parts normal. 



Gnathopods generally powerful ; sometimes more powerful 

 in male than female. Pereiopods more or less slender, sometimes 

 basal joint of pereiopods three to five only slightly expanded. 



Terminal uropods with rami foliaceous and projecting beyond 

 the others. Telson either entire or cleft to the base. 



Eucrangonyx Stebbing. 



Body compressed, not carinate. 



First to fourth coxal plates deeper than the following ones. 



First antennse longer than the second, and with a small bi- 

 articulate accessory flagellum. 



Maxillipeds with outer plates narrow. . 



First and second gnathopods subchelate, with propodus not 

 strikingly broader than carpus. Third to fifth pereiopods with 

 basal joint moderately expanded. 



