No. 26.] ARTHROSTRACA OF CONNECTICUT. 15! 



shorter than in male and propodus narrower, but otherwise quite 

 similar in form. Second gnathopods with propodus resembling 

 that of male but less densely setose apically, palm with a strong 

 prehensile spine. Third pereiopods with basal joint broader than 

 long. 



Third segment of abdomen with postero-lateral angles 

 rounded. 



First and second uropods spinose; first pair with peduncle 

 longer than rami. Third pair with peduncle twice as long as 

 rami; outer ramus with two strong hooks apically, inner ramus 

 narrower than outer, with two lateral spines and an apical one 

 and several setae. Telson as broad as long, apex rounded, between 

 two little tubercles, within which are three setules on each side. 



The color of the species varies from green to reddish; gen- 

 erally there is a row of light colored spots along the mid-dorsal 

 line, one spot for each segment. 



Length 20 mm. 



Distribution: Norway; England; France; Azores; Labrador; 

 Bay of Fundy ; Grand Manan ; Woods Hole, Massachu- 

 setts; Newport, Rhode Island; Noank, New Haven (Smith), 

 Long Istand Sound, north of Fishers Island, off Stonington, Con- 

 necticut. 



The species occu'rs under rocks and in algae at low tide on 

 muddy shores and to depths of 9 fathoms. It occupies tubes 

 covered with sand and bits of algse, attached to the underside 

 of stones at low-water mark. 



Grubia Czerniavski. 



Like Amphithoe but first antennae have a uniarticulate acces- 

 sory flagellum and second antennae an elongate flagellum. Man- 

 dible with third joint of slender palp not distally expanded. 



Grubia cornpta (Smith). 



1874. Amphithoe compta, Smith, Rep. U. S. Com. Fish, for 

 1871-2, p. 564. 



1905. Grubia compta, Holmes, Bull. U. S. Bur. Fish., vol. 

 24, p. 510. 



Eyes round, situated on interantennal lobes. 



