332 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



able jfinger has four strong carinae, two outside, one above, one 

 inside; the immovable finger has three carinae. In the small male 

 (20717) the major chela is very little stouter than the minor. The 

 female (11403) lacks the left chela; the dactylus of the right chela is 

 longer than the upper surface of the manus. Legs densely pubescent ; 

 merus with a row of spinules above, carpus mth two rows. 



Measurements. — Female (11403), length of carapace 6.2, width of 

 same 9.5, fronto-orbital width 6, width of front 3.1 mm. 



Range. — Gulf of Mexico; Straits of Florida; Barbados (A. Milne 

 Edwards). 26 to 101 fathoms. 



Material examined. — Gulf of Mexico; south of St. George Island, 

 Florida; lat. 28° 46' 00" N., long. 84° 49' 00" W.; 26 fathoms; crs. 

 S. Co.; March 15, 1885; station 2406, Albatross; 1 male (20717). 



Gulf of Mexico; northwest of Tortugas; lat. 25° 33' N., long. 84° 

 21' W.; 101 fathoms; temperature 61%° F.; 1877-78; U. S. Coast 

 Survey Steamer Blake; 1 male (2772, M.C.Z.). 



Straits of Florida; lat. 25° 05' 00" N., long. 80° 15' 00" W.; 56 

 fathoms; Co. S.; April 9, 1886; station 2640, Albatross; 1 female 

 (11403). 



LOPHOPANOPEUS SOMATERIANUS, new species 



Plate 153, Figures 3 and 4 



Two specimens of a dactylus or movable finger of a cheliped of this 

 genus have been taken from stomachs of Somateria at St. George 

 Island, Pribilof Islands, Bering Sea, Alaska, by the United States 

 Biological Survey. One, which may be considered the holotype 

 (Cat. No. 61135, U.S.N.M.), is from <S. spedabilis, King Eider 

 (B. S. 149820), taken February 4, 1917; the other (Cat. No. 61138) 

 is from S. v-nigra, Pacific Eider (B. S. 149824), February 6, 1917. 

 Both are right dactyli, tapering regularly to the tip and smooth ex- 

 cept on prehensile edge. The holotype is about 10 mm. long, thick, 

 with an irregular line of six unequal, low, separated tubercles along 

 the outer base of the blunt prehensile edge; a larger tubercle than 

 these but also low is situated near the proximal end of the inner half 

 of the same surface. Three longitudinal lines of punctae on the outer 

 surface and also on the inner surface. The second specimen is about 

 8 mm. long, resembling the first, except that the tubercles are less 

 worn, more triangular and more projecting, and form with two small 

 intercalated denticles a continuous, subacute edge. Color of both 

 fingers hair brown with whitish tip. 



Both ducks are Arctic species. Somateria spectabilis is said to 

 winter from the Aleutian Islands to Kadiak Island and from south- 

 ern Greenland and Gulf of St. Lawrence south to Long Islaad: 5, 

 v-nigra winters in Bering Sea about the Aleutian Islands. 



