No. 26.] ARTHROSTRACA OF CONNECTICUT. I09 



with stout peduncle which has the last two joints of subequal 

 length ; flagellum shorter than peduncle. 



First gnathopods of male with propodus elongated, much" 

 longer than carpus, tapering from near the base and with palm, 

 which is continuous with posterior margin, somewhat uneven 

 and armed with a spine near the middle and a large spine with a 

 row of several small ones at distal end. Second gnathopods of 

 male with propodus much larger than in first, twice as long as 

 carpus, subquadrate in form, slightly broader toward distal end, 

 palm oblique and uneven and sharply marked off from posterior 

 margin, armed with a stout spine near middle and several near 

 prehensile angle. Gnathopods in female smaller than in male and 

 more nearly of same size and shape. 



Postero-lateral angles of second and third abdominal seg- 

 ments produced and acute, the margin above the angles generally 

 furnished with short setae; the three posterior segments with a 

 median projection bearing a fascicle of spines and a lateral 

 fascicle on each "side. 



Terminal uropods with both rami stout, inner one nearly as 

 long as first joint of outer and armed with about four stout spines. 



Telson with a group of two or three spines near base and 

 three on apical margin, with another spine near the latter close 

 to the outer margin. 



Color olive brown to reddish brown ; red, orange, or pink 

 spots produced by globules may occur at the bases of the pleopods 

 and first uropods as well as along the intestine. 



Length about 25 mm. According to Sars, Arctic specimens 

 attain a length of 48 mm. A few specimens collected at Savin 

 Rock, near New Haven, measured 30 mm. 



Distribution: Arctic Ocean, Atlantic coast of Europe; Medi- 

 terranean ; also in the Pacific Ocean it extends from Behring 

 Strait for a considerable distance down the coasts of both North 

 America and Asia. It is the commonest species along the New 

 England coast. Within Connecticut it has been reported from 

 New Haven, Noank, ofif Stonington, Fishers Island Sound, N. 

 of Fishers Island (35^ to 5 fathoms). Long Island Sound. 



In depth it ranges from low-water mark, where it is exceed- 

 ingly abundant especially under stones, to a depth of over 50 

 fathoms. 



