1921 ] Schmitt: The Marine Decapod Crustacea of California 99 



Characters. — First to fourth abdominal segments, inclusive, smooth. Anterior 

 median spine of the carapace projecting in front of the line of the orbits. Ros- 

 trum narrower than in C. munita, and ascending at an angle of about forty-five 

 degrees. Hands much as in C. munita, but with anterior margin of hand more 

 longitudinal. 



Dimensions. — Type, male: length 24.8 mm., length of carapace 7.4 mm., of 

 scale 3 mm. 



Type Locality.— OS Santa Cruz Island, California, 266 fathoms ("Albatross" 

 station 2948). 



Distribution. — Also off Trinity Islands, Alaska, 159 fathoms; Santa Catalina 

 Island, California, 80 fathoms; southwest of San Nicolas Island, California, 158 

 fathoms. One specimen taken at each locality (Rathbun). 



Crago variabilis (Rathbun) 



Crangon variabilis Rathbun, Proc. U. S. Nat. Mus., 24, 890, 1902; H. A. E., 

 10, 129, fig. 69, 1904. 



Fig. 68. Crago variabilis, 5; a, antennal scale, X 4; b, dorsal view of carapace 

 and abdomen, X 2; c, lateral view of carapace, X 2; d, chela, X 4 (from Rathbun, 



U. S. N. M.). 



Characters. — Second, third, fourth, and fifth (sometimes the first) abdominal 

 segments carinated, and except or. the first two the carina is usually high, laterally 

 compressed, and blunt. Carapace much as in C. munita, but nearly half as long 

 as the abdomen. Rostrum short, convex from behind forward, the tip rounded 

 and thickened. Hands vary from two and a half to three times as long as wide. 



Dimensions. — Type, female: length 32.2 mm., length of carapace 9.2 mm., 

 of hand 5.6 mm. ; width of hand 2 mm. Of male, also measured by Miss Rathbun : 

 length 24.6 mm., length of carapace 7 mm., of hand 4.1 mm. ; width of hand 

 1.5 mm. 



Type Locality. — Off North Head, Akutan Island, Alaska, 72 fathoms ("Alba- 

 tross" station 2842). 



Distribution. — Bering Sea, Alaska Peninsula, and Aleutian Islands; California 

 (southwest of San Nicolas Island, 158 fathoms); 50 to 695 fathoms (Rathbun). 



Remarks. — Miss Rathbun remarks: 



There is more variation in this species than is usual in this genus, perhaps 

 owing to the great bathymetrical range. 



The rostrum is often much thickened and elevated, the median sulcus being 

 almost obliterated. 



The hand is not of uniform proportion. It is longer in the male than in the 

 female, and varies in specimens of the same sex from different localities. The 

 median abdominal carina is in general less strong on specimens from deeper 

 water. 



These differences are not sufficiently constant to warrant the division of the 

 species. 



