DECAPODS 



129 



,, 



FIG. 68. 



station fsldf 



Crangon acclivts. 



( * 



a. Dorsal 



CRANGON ACCLIVIS Rathbun. 

 Crangon acclims RATHBUN, Proc. U. S. Nat. Mus., xxiv, 890, 1902. 



Allied to C. munita. Lower lateral spine of carapace farther back ; 

 anterior median spine much larger and farther forward ; it projects well 

 in front of the posterior line of the orbits. 

 The rostrum is narrower, and ascending at 

 an angle of about forty-five degrees. The 

 anterior margin of the hand is more longi- 

 tudinal than in C. munita. The divisions of 

 the ventral carina of the thorax in the male 

 are much more spiniform in this species. 



Dimensions. Length of male 24.8 mm., 

 length of carapace 7.4 mm., of antennal 

 scale 3 mm. 



Type locality. O ff Santa Cruz Island, Cal- 



Jf J 



ifornia, 266 fathoms (Albatross 



2948), i male. d - Chela - <x 8). 



Distribution. Off the Trinity Islands, Alaska, 159 fathoms (Albatross 

 station 2853) ; Santa Catalina Island, California, 80 fathoms (Albatross 

 station 3664) ; southwest of San Nicholas Island, California, 158 fathoms 

 (Albatross station 2898). One specimen taken at each locality. 



In the foregoing species the first four segments of the abdomen are 

 smooth. We now come to a group also resembling C. munita in general 

 appearance, but having the abdomen in front of the fifth segment more or 

 less carinated. 



CRANGON VARIABILIS Rathbun. 



Crangon -variabilis RATHBUN, Proc. U. S. Nat. Mus., XXIV, 890, 1902. 

 The carapace is much like that of C. munita^ but is nearly half as long 



as the abdomen. The rostrum is short, convex from behind forward 



and the tip rounded and 

 thickened. The anten- 

 nal scale has a concave 

 outer margin and the 

 spine equals or extends 

 beyond the blade. The 

 chelipeds are stouter ; the 

 hands vary from two and 

 a half to three times as 



FIG. 69. Crangon variatilis. 9. Station 2842. a. Dorsal 

 view of carapace and abdomen (X 2). b. Side view of carapace 

 (X 2). c. Acicle (X 4). d. Chela (X4>- 



j 

 n(1 > 



a wide. The SCC- 



fV.i'r/1 frmrtVi and 

 tnlrcl > tOUTtn, and 



