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 

 ^^j-j-...^^^^ a Httle beyond it ; flagella reaching only a little 

 ^^^^ \v beyond antennal scale. Scale broad, about two 



T j thirds as long as carapace. The maxillipeds 



^"^'^....^.-.-^ reach a Httle beyond the antennal scale. The 

 tel^t^^^^otTJ::^^^:!'^ Pal^^s of the first pair of feet extend to the last 

 (X If). PortMoUer. 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. Dall at 14 stations from Nunivak southward and 

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

 Off Bristol Bay, 71^-14^ fathoms {Albatross stations 3232, 3233, 



3236). 

 OflE Kululak Bay, 1 5 fathoms {Albatross station 3300). 

 Lat. 630 50' 00" N., long. 167° 21' 00" 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, being more than one 

 and a half times as long as the fifth segment. 



