S. I. Smith — Crustaceans of the Atlantic Coast. 59 



fection. In large specimens and those which are slightly worn the 

 spines are usually much shorter, stouter and more uniform in length, 

 and show scarcely any trace of ciliation (Plate XI, figure 11). In 

 specimens considerably worn the spines are, of course, frequently 

 partially or wholly destroyed. 



The males are much smaller than the females; the largest male, 

 among the specimens examined, is 45™"^ in length and the largest 

 female, 72™'", which represents very nearly the average difference in 

 size. In the armament of the carapax and of the extremity of the 

 telson the sexes agree perfectly. The males are at once distinguished 

 from the females, however, by the longer flagella of the antennulas 

 and antennae. 



Massachusetts Bay !, 1877, common in 35, 48, and 50 fathoms, 

 muddy bottom, August 6 to 10, — many of the females carrying eggs ; 

 and taken also in 20 fathoms, rocks and gravel, and 36 fathoms, mud 

 and fine sand. Off Cape Ann!, 1878, in 26 to 60 fathoms, common on 

 muddy bottoms, and occasionally on sandy, pebbly and rocky bottoms. 

 Gulf of Maine!, off the Isles of Shoals, 25 fathoms, rocky, 1874, and 

 eight miles south of Monhegan Island, 64 fathoms, mud and sand, 

 1873, — only a single very small specimen in each case. Off Casco 

 Bay !, twenty miles southeast of Cape Elizabeth, 68 fathoms, mud, 

 August 12, 1873, — two females, one carrying eggs. Off Halifax!, 

 Nova Scotia, 1877, 52 fathoms, fine sand and mud, September 21, — 

 common; 57 fathoms, mud, gravel and stones, September 5, — two 

 females, one carrying eggs. Gulf of St. Lawrence !, 60 fathoms, 1872 

 (J. F. Whiteaves). West coast of Davis' Straits (Sabine). Greenland 

 (Reinhardt, Ltitken). Iceland (Kroyer). Sintzbergen (Kroyer). 

 Lofoten Islands!, coast of Norway (G. O. Sars), — one male with two 

 large females of the next species. 



Sabinea Sarsii, sp. nov. 



Plate XI, figures 6, 7, 8. 



The eyes, antennulse, and the thoracic appendages differ very 

 slightly if at all from those of the last species ; the lateral squami- 

 form appendage of the first segment of the peduncle of the antennula, 

 in all the specimens examined, is, however, more prominent and acute 

 than iu septemcarinata. The rostrum reaches considerably beyond 

 the eyes and, as seen from above, terminates in an acute tip. The 

 dorsal carina of the rostrum is sharper and higher than in the last 

 species and extends to the very tip, which is obtusely rounded as seen 

 laterally. The dorsal carina of the carapax is sharper and its teeth 

 more prominent, and usually more numerous, than in the last species. 



