DECAPODS 139 
The typical Wectocrangon Jar is primarily an Arctic species, and is re- 
placed in the Aleutian Islands and the southern part of Bering Sea by a 
species which is very closely allied, and has been heretofore 
united with JV. Zar. It differs chiefly in the carinz of the sixth 
abdominal segment terminating posteriorly in a small sharp 
tooth or spine. The hand is more elongate, being about five p 
times or more than five times as long as its width across the palm. “ 
Dimensions.— Female, length 73 mm., length of carapace Neri de 
° dentata. @ 
19 mm., length of hand ro mm., width of palm 2.1 mm. (< 13). Sta- 
Type locality.—Off Sitkalidak Island, Alaska, 69 fathoms Acie” % 
(Albatross station 2855). a 
Distribution.— Bering Sea southward to Sitka and southeast coast of 
Kamchatka; Atlantic coast of North America from Greenland to Nova 
Scotia, 6 to 96 fathoms. 
From Bering Sea, in lat. 59° 55’ 00” N., southward to Aleutian Islands 
and Alaska Peninsula, at 65 stations of the 4d/éatross, 21-93 fathoms. 
Southeast coast of Kamchatka, 96 fathoms (A/batross). 
Aleutian Islands eastward to Sitka Harbor, 6-80 fathoms (W. H. Dall). 
Plover Bay, Siberia, 10-25 fathoms (W. H. Dall). 
It will be noticed that the habitats of V. Jar and JV. dentata overlap in 
Bering Sea, that each is occasionally found at the extreme limit of the 
other’s range (e.g., 4V. dar at Kadiak and Vancouver Island, and JV. 
dentata at Plover Bay), and that 1V. dentata extends into deeper water. 
The species recorded from the North Atlantic by Professor S. I. Smith, 
under the name J. Zar, is, I think, identical with V. dentata. The same 
form was collected by the Princeton Expedition at Greenland; specimens 
from Granville Bay are in the National Museum. 
NECTOCRANGON OVIFER Rathbun. 
Nectocrangon lar RATHBUN, The Fur Seals and Fur-Seal Islands of the North 
Pacific Ocean, Pt. III, 556, 1899 (part). 
Nectocrangon ovifer RATHBUN, Proc. U. S. Nat. Mus., XXIV, 892, 1902. 
In the deeper waters of Bering Sea there lives another species of JVec/o- 
crangon closely allied to V. dar and XW. dentata, Like them, it bears two 
median spines on the carapace; the median crest is, however, higher, 
and the spines more ascending; the three spines of the anterior margin 
above the eyes are longer and more deeply separated from each other. 
The tubercle on the anterior surface of the eye is more prominent and 
acute; the eyes themselves are of greater size. The spine of the antennal 
scale extends away beyond the blade, much more so than the allied species. 
The pleon is relatively shorter than in V. Jar and NV. dentafa,; the median 
carina in the female is higher; the carine of the sixth segment end in a 
