120 RATHBUN 



with a deep intervening sulcus; the seventh segment has a shallow 

 median sulcus. 



Dimensions. Length of ovigerous female from tip of rostrum to tip 

 of telson 61.5 mm., length of carapace 16.2 mm., of antennal scale 

 11.5 mm. 



Type locality. Bering Sea, off Cape Seniavin, Alaska, 30 fathoms 

 (Albatross station 3287). 



Distribution. Bering Sea and Aleutian Islands to Sitka; Kamchatka, 

 Okhotsk Sea, and Kurile Islands; in 4^-61 fathoms. Taken by the 

 Albatross at 70 stations, by W. H. Dall at 15 stations; by Lieutenant 

 G. M. Stoney, U. S. N., at 7 stations, by C. L. McKay at Bristol Bay. 

 Occurs in large numbers in Bering Sea. 



Bellingham Bay, Washington, n fathoms, 200 specimens (Albatross 



station 3612). 

 Bering Island, stomach of Gadus macrocephalus, i specimen (N. Greb- 



nitzky). 



Rakovaya Bay, Avacha Bay, Kamchatka, i specimen (Albatross]. 

 Off Robben Island, Okhotsk Sea, 18 fathoms, i specimen (Albatross 



station 3646). 

 Off Kurile Islands, 14 fathoms, i specimen (Albatross station 3652). 



Affinities. This species is analogous to C. allmani Kinahan of the 

 North Atlantic, but in that species the rostrum is shorter and narrower, 

 the antennal scale is shorter and the end of its blade more oblique, the 

 hand is longer and its anterior margin is more longitudinal than trans- 

 verse. 



In the form of the carapace C. dalli resembles C. alaskensis and C. 

 septemspinosa, with which it occurs, but is readily separated from them 

 by the prominent carinae of the sixth abdominal segment and the 

 shape of the hands, which in those species are oblong, but in C. 

 dalli widen distally. 



CRANGON FRANCISCORUM Stimpson. 



Crangon franciscorum STIMPSON, Proc. Cal. Acad. Sci., I, 97, 1856; Jour. 

 Boston Soc. Nat. Hist., vi, 495, pi. xxn, fig. 5, 1857. HOLMES, Co- 

 cas. Papers Cal. Acad. Sci., VII, 172, 1900, and synonymy. 



Carapace about three eighths as long as abdomen. Rostrum short, 

 triangular, tip broadly rounded. Antennal flagella very unequal, the 

 inner one longer than the antennal scale and greatly exceeding it, the 

 outer one less than half as long as the scale. Scale about three fourths 

 as long as the carapace, the blade broad and slightly rounded at the 

 extremity, spine exceeding it, flagellum nearly as long as, or longer than, 

 the body. Maxillipeds not attaining the end of the scale ; first pair of 



