PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 159 



forward around the sides of the head; the second, third, and fourth 

 segments usually present two serrations, both the anterior and posterior 

 angles being produced and acute, and the last three segments are pro- 

 duced and directed more and more backward. In the dorsal region, 

 each segment bears a pair of sharp tubercles or spines. Anteriorly these 

 spines are near the front margins of the segments and directed forward, 

 but become posteriorly more erect and nearer the middle of the segment, 

 and the last three pairs are directed backward, the last pair being near the 

 hinder margin of the seventh segment. The legs are slightly spiny, the 

 first pair but little thickened in the females. The pleou tapers at the 

 sides, where it is minutely serrulate. Its posterior angles are salient and 

 acute, like the anterior angles of the head. The uropods are of moderate 

 length, about as long as the pleon, and composed of a cylindrical basal 

 segment, bearing two rami, of which the inner is somewhat the larger, 

 and nearly as long as the basal segment. Both, together with the basal 

 segment, are sparingly bristly. 



The color in alcohol is nearly white. Length S m . 



Two specimens of this species were collected at BaiHjiiereau by Cap- 

 tain Collins, of the schooner Marion. August 2.">. 1S78. They \vere found 

 adhering to the cable of the schooner. 



Munna Fabricii Kn'iycr, N;il urhist. T^nls-k.. 1 1, Rind ii. p. :>. U 0, Ir47 ; Gaiin:ir<r- Voyage. 

 en Sr;mdi!iavir, etc., At la-. )>1. :'.!. ligs. 1 n-ij, 1.S1S). 



Casco Bay, near Portland, Me.. Last port and Western Bank, from low 

 water to 150 fathoms. 



Munnopsis typica M. Snrs, Christiania Vidensk. Srlsk., I860, p. 84, 1861; Bid rag- til 

 Kundskab oni < lirist iania Fjordrii.s Fauna (Nyt Magazin), p. ?U. pi. vi, vii, 

 figs. 101-138, 1868. 



This species has been taken in the Bay of Fundy in GO fathoms; also, 

 by Mr. J. F. AVhiteaves, in the Gulf of Saint Lawrence. 



Eurycope robusta 1 larger, Am. Jour. Sci., Ill, vol. xv, p. :!75, 1878. 



Xot yet i'ound south of the Gulf of Saint Lawrence, where it was taken 

 by Mr. J. F. AVhiteaves in 220 fathoms, muddy bottom. 



Chiridotea cceca Harder, Am. Jour. Sci., Ill, vol. xv, p. 374, 1878. IdotcaccccaSay, 

 .Jour. Aca.l. Nat. Sci. Phil., vol. i, p. 424, 1818. 



Common on the southern coast of New England, and taken as far 

 north as Halifax in the summer of 1877. 



Chiridotea Tuftsii Harger, Am. Jour. Sci., Ill, vol. xv, p. 374, 1878. Idotea Tufisii 

 Stimpson, Mar. Invert. Grand Mao an, p. 39, 1853. 



This species has been taken at various points along the coast from 

 Long Island Sound to Halifax, but was regarded as rare until the sum- 

 mer of 1878, when it was collected in abundance at Gloucester, Mass. 



