138 RATHBUN 
more transverse, making the palm appear longer. The abdominal 
carinz are higher and thinner, especially on the third segment; the in- 
fero-posterior angle of the fourth segment may have a small spine. The 
abdomen is more elongate, notably the sixth segment. 
Dimensions.— Large male, length 55.7 mm., length of carapace 13.6 mm. 
Distribution.— Arctic coast of Alaska and Siberia southward to Sitka 
and Kurile Islands; Greenland (Kroyer). Beach to 47 fathoms. 
In the U. S. National Museum this species is represented by numer- 
ous specimens ranging from the Arctic coast of Alaska and Siberia south- 
ward via Bering Strait to Bering Sea, lat. 56° 12’ o0// N. Within these 
limits it is very abundant and was taken at 21 stations of the A/éatross, 
at 8 stations by Lieutenant G. M. Stoney, U.S. N., at 7 stations by W. H. 
Dall, at 2 stations by the U.S. R. S. Corwin, off the mouth of the Yukon 
by E. W. Nelson, and at Cape Smith by the Point Barrow Expedition. 
Also taken at the following localities: 
Shahafka Cove, Kadiak, 12-14 fathoms (W. H. Dall). 
Sitka Harbor, 15 fathoms (W. H. Dall). 
Avacha Bay, Kamchatka (L. Stejneger and Alvatross; also recorded by 
Stimpson). 
Rakovaya Bay, Avacha Bay (Adbatross). 
Off Kamchatka, 12-13 fathoms (A/batross stations 3776, 3777, 3779; 
3780). 
Off Iturup Island, Kurile Islands, 14-18 fathoms (A/datross stations 3652, 
3653). 
Off Robben Island, Okhotsk Sea, 18-20 fathoms, stations 3646, 3647. 
NECTOCRANGON DENTATA Rathbun. 
Nectocrangon lar SMITH, Trans. Conn. Acad. Arts Sci., v, 61, 1879 (part); 
not JV. /ar(Owen).—RATHBUN, The Fur Seals and Fur-Seal Islands of the 
North Pacific Ocean, Pt. 111, 556, 1899 (part)—-HOLMES, Occas. Papers 
Calif. Acad. Sci., vil, 178, 1900 (part)—-ORTMANN, Proc. Acad. Nat. Sci. 
Phila., 1901, 164 (part). 
Nectocrangon dentata RATHBUN, Proc. U. S. Nat. Mus., XXIV, 892, 1902. 

Fic. 76. Nectocrangon dentata. @ (X 14). Station 3216. a. Dorsal view of 
carapace and abdomen. 4. Side view of carapace and part of abdomen. 
