No. 26.] ARTHROSTRACA OF CONNECTICUT. I95 



subequal ones. First three segments with abundant setae on 

 lateral margins which are continued as transverse bands over the 

 dorsal side of the first and second segments near the posterior 

 margins. Last two segments much narrower than the preceding 

 ones ; the fourth segment very short. The last segment is sub- 

 quadrangular and bears a triangular process at each side near 

 base. Pleopods, three pairs, consisting of a peduncle with two 

 semioval lamelliform rami. Uropods scarcely longer than last 

 two segments of abdomen ; basal segment comparatively small ; 

 second segment nearly as long as first, and third segment half as 

 long as the second. 



Color brown, mottled with lighter above ; nearly white beneath. 



Length 5 mm. 



The species occurs on piles and among algse and eel-grass 

 from I to 6 feet in depth. It is found on sponges, Balanns, 

 Lauiinaria, and oysters. 



Distribution : Greenland, Norway, British Isles, Bermuda, 

 Azores, Mediterranean, Long Island Sound; Noank, Connecticut. 



This species is readily recognized among the New England 

 Isopoda by the set£e on the abdomen which are arranged on its 

 margins and in two transverse rows near the posterior margins 

 of its first two segments. 



Leptochelia savignyi (Kroyer). 



Fig. 57. Leptochelia savignyi. 



1874. Tanais iihim, Harger, Rept. U. S. Com. Fish, for 1871- 

 2, pt. I, p. 573. 



1879. Leptochelia algicola, Harger, Proc. U. S. Nat. Mus., 

 vol. 2, p. 162. 



1905. Leptochelia savignyi, Richardson, Bull. U. S. Nat. 

 Mus., No. 54, p. 26. 



