2l6 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



longer than first; third and fourth joints equal in length and each 

 about twice as long as first. Second antennae with first joint 

 very short; second, third, and fourth joints subequal; fifth joint 

 a little longer than the fourth; flagellum made up of five joints 

 and exceeding in length the last two joints of the peduncle. 



Thoracic segments subequal in length and broader than its 

 mid-dorsal length; first segment broadly excavated for head. 

 Coxal plates distinctly marked off from their segments except the 

 first pair; last four pairs produced behind into acutely pointed 

 processes. First three pairs of legs subchelate, with propodus 

 swollen and dactyl short and reflex ; last four pairs of legs ambu- 

 latory and similar in form and increasing in length to the sixth 

 which is the largest ; all the legs with abundant setae. 



Abdomen composed of four segments; first three quite short, 

 broadening somewhat posteriorly. Telson acutely pointed with 

 lateral sutures of at least one more coalesced segment; lateral 

 margins near extremity denticulated, converging for their anterior 

 half gradually, and then more rapidly to the apex. Opercular 

 valves ciliated along postero-external margin, in two parts, the 

 small terminal part representing the outer ramus of the uropods ; 

 inner ramus attached to peduncle on the external side. 



Its color in life is variable but usually dark grayish. There 

 may be a mottling of light yellowish gray at the sides of the head 

 and body. 



Length 12-15 mm - 



Distribution : Florida ; New Haven, Connecticut ; Long Island 

 Sound ; Woods Hole, Provincetown, Nantucket, Nahant, Massa- 

 chusetts ; Vineyard Sound ; Halifax, Nova Scotia. 



This species is common on sand beaches at many localities on 

 the New England coast and Long Island Sound. It is usually 

 found below high-tide mark or burrowing just beneath the sur- 

 face throwing up a little ridge like a mole, and making a little 

 mound at the end. It swims with ease. It is distinguished from 

 the following species by its large size and shorter second antennas 

 which are but little longer* than the first pair. From other New 

 England Isopoda it may be distinguished by the broad subcircu- 

 lar thorax, the articulated flagellum of the second antennae, and a 

 two-valved abdominal operculum. 



