72 RATHBUN 
half. Two spines above the eye, the posterior one above and much 
larger than the anterior. 
Outer spine of antennula reaching the end of the second segment or 
a little beyond it; flagella reaching only a little 
SS beyond antennal scale. Scale broad, about two 
thirds as long as carapace. The maxillipeds 
reach a little beyond the antennal scale. The 
dent Side of can h'@ Palms of the first pair of feet extend to the last 
Crab) Pore Molle: segment of the maxillipeds. The last 3 pairs of 
feet are stoutish, the last pair scarcely reaching the end of the anten- 
nal peduncle. 
The telson is a little more than one and a half times as long as the 
sixth segment, and is armed with 4 pairs of lateral spinules. 
In the males the carapace is flatter, the rostrum more horizontal, less 
upturned. 
Dimensions.— 3 , length 40 mm., length of carapace and rostrum 13.5 
mm., of rostrum 5.6 mm. 
Distribution. — Bering Sea to Sitka; Kamchatka; Okhotsk Sea; 
Japan. 
Taken by W. H. Dall at 14 stations from Nunivak southward and 
along the Aleutian Islands and Alaska Peninsula to Sitka, 5-20 fathoms. 
Off Bristol Bay, 74%{-1434 fathoms (Addatross stations 3232, 3233, 
236). 
of ine Bay, 15 fathoms (A/batross station 3300). 
Lat. 63° 50’ oo” N., long. 167° 21/ oo” W., 17 fathoms (Lieutenant 
George M. Stoney, U. S. N.). 
Sitka (Harriman Expedition). 
Bering Island (L. Stejneger). 
Bering Island, in stomach of Gadus macrocephalus (N. Grebnitzky). 
Petropavlovsk, Kamchatka, 10-12 fathoms (N. Grebnitzky). 
Okhotsk Sea (Brandt). 
Hakodate Bay, Japan (Stimpson). 
SPIRONTOCARIS DALLI Rathbun. 
Spirontocaris dalli RATHBUN, Proc. U. S. Nat. Mus., XXIV, 894, 1902. 
Female.—Allied to S. ochotensis, from which it is separated by few 
but well-marked characters. The rostrum is longer than in SS. ochotensis, 
reaching nearly to the end of the antennal scale; the midrib is straighter, 
less sinuous, and terminates in a single sharp spine; the teeth on the ros- 
trum are 6-8 above, 3-4 below. The carapace is lower. The last 3 
pairs of thoracic feet are longer and more slender. The sixth segment 
of the abdomen is also longer than in S. ochotensis, being more than one 
and a half times as long as the fifth segment. 
