DECAPODS 23 



the telson is longer than the sixth segment, and at the posterior end is 

 notched with a very shallow V-shaped 

 sinus, so shallow that the extremity can 

 hardly be called ' forked.' 



Dimensions. Length of female 81 

 mm., of carapace 33.3 mm. 



Distribution. Santa Barbara Chan- 

 nel, California, 265 to 322 fathoms _ 



Stations 2903, 2904, 2960, FlG . 4 . Pasi -p ha , a emarginata. 5. Station 



3200, and 3201). Gulf of California, ^Mxl) 6 view f Carapa e (X ' ) ' *' 

 off Concepcion Bay, Lower California, 857 fathoms, station 3009 (type 

 locality). 



PASIPH^A PRINCEPS Smith. 



Pasiphae princeps SMITH, Kept. U. S. Commr. Fish and Fisheries for 1882, 



p. 381, pi. v, fig. 2 (1884); op. cit. for 1885, p. 682 (1886). 

 Pasiphaeia princeps FAXON, Mem. Mus. Comp. Zool., XVIII, 175, 1895. 



One large female, 167 mm. long, was dredged by the Albatross off Sea 

 Lion Rock, Washington, in 859 fathoms, station 3075; and one small 

 specimen about 47 mm. long, north of Unalaska, in 399 fathoms, station 



33 2 9- 



I have at hand only one specimen determined by Professor Smith. It was 



taken south of Marthas Vineyard in 538 fathoms, at station 2546. It 

 measures 150 mm. long. It differs from the type in having the carina 

 of the posterior two thirds of the carapace well marked though blunt, in 

 the gastric tooth projecting well beyond the frontal margin, the anterior 

 (or inferior) margin of this spine contiguous with the dorsal surface of 

 the carapace in advance of the spine, and in having the merus of the first 

 and second pairs of feet armed with numerous spines (instead of the first 

 pair unarmed and the second pair few-spined). The antero-lateral sinus 

 is rectangular, as in the figure of the type. 



In five smaller specimens from off Cape Romain, South Carolina, 353 

 fathoms, station 2626, and two from off Marthas Vineyard, 349 fathoms, 

 station 1093, the gastric tooth projects only a little beyond the frontal 

 margin, and the antero-lateral sinus has margins oblique to each other ; 

 otherwise as in the preceding. 



In the specimen from off Ecuador described by Faxon (loc. cit.} the 

 merus of the first pair of feet is unarmed. 



The Washington specimen agrees quite closely with that from station 

 2546, excepting that the median carina of the carapace is sharper along 

 its posterior two thirds. The small individual from Bering Sea may 



