212 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



laterally and prolonged to an acute angle between the two rami, 

 the outer one of which is short and unguiform and the inner one 

 is sublinear, about the length of the peduncle and terminating 

 in a dense tuft of setae. 



Color light grayish. 



Length 4.5 mm. 



Distribution: Coast of Great Britain; North Sea; Adriatic 

 Sea ; coast of Norway ; Behring Island ; Pacific Ocean ; San Diego, 

 California; from Florida to Halifax and the Gulf of St. 

 Lawrence. 



It occurs above low-water mark but does not usually live far 

 below that line. It has, however, been found by Professor Verrill 

 at a depth of 10 fathoms in Casco Bay and has been dredged at 

 a depth of 7^ fathoms in Cape Cod Bay. 



This species may be recognized by its habits, being usually 

 found burrowing in submerged timbers, which it may penetrate 

 to the depth of half an inch. 



Body short, oval. Convex, capable of being rolled into a 

 ball. Head transverse. 



First and second antennse multiarticulate, with evident dis- 

 tinction into peduncle and flagellum. 



Mandibles with palps. 



Coxal plates united with their segments. 



Abdomen with the anterior segments short and fused; last 

 segment large. Uropods lateral; outer ramus movable when 

 present; inner ramus fixed. 



Sphasroma quadridentatum Say. 



1818. Sphceroma quadridentatum, Say, Jour. Acad. Nat. Sci. 

 Phila., vol. i, p. 400. 



1874. Sphccroma quadridentatum, Harger, Kept. U. S. Com. 

 Fish, for 1871-2, p. 569, pi. 5, fig. 21. 



1880. Spharoma quadridentatum, Harger, ibid., for 1878, 

 p. 368, pi. 9, fig. 53. 



Body ovate, twice as long as wide. Head twice as broad as 

 long with a frontal border arising between the eyes and pro- 



