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 

 beyond antennal scale. Scale broad, about two 

 thirds as long as carapace. The maxillipeds 

 reach a little beyond the antennal scale. The 



P alms of the fa &t P air of feet extend to the last 

 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. ? , 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. Ball at 14 stations from Nunivak southward and 

 along the Aleutian Islands and Alaska Peninsula to Sitka, 5-20 fathoms. 

 Off Bristol Bay, 7^-14^ fathoms (Albatross stations 3232, 3233, 



3 2 3 6 )- 



Off Kululak Bay, 15 fathoms (Albatross 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 S. 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 t being more than one 

 and a half times as long as the fifth segment. 



