DECAPODS 



129 



CRANGON ACCLIVIS Rathbun. 

 Crangon accUvis Rathbun, Proc. U. S. Nat. Mus., xxiv, 890, 1902. 



Allied to C. viunita. 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. 



7]';^^/^(:a//A'. — Off Santa Cruz Island, Cal- ^ ,<, ^ ,. . t^ i 



^-^ -^ ' t IG. 68. C ratigon acclizns. a. Dorsal 



ifornia, 266 fathoms {Albatross station V'^^^Y^^'^Fap^'ce. 3 (x 4)-. station 2943. 



' \ /'. Side view (X 32)- ''• Acicle. ? (X8)- 



2948), I male. ^. cheia. ? (xs). 



Distribution. — O'^ 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 s\?i\\oxi 2%<^Z). 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 

 T^=?-- — y thickened. The anten- 

 nal scale has a concave 

 outer margin and the 

 spine equals or extends 



.,^ beyond the blade. The 



^>y~!!> "^ chelipeds are stouter ; the 



hands vary from two and 

 a half to three times as 



Fig. 69. Crangon vnHnhilis. 9. Station 2842. a. Dorsal 'O^g ^.S WldC. 1 he SeC- 

 view of carapace and abdomen (X 2)- b. Side view of carapace ^^a 4-U,',t1 f^m-tV. nnrl 

 (X2). f. Acicle (X 4). ^. Chela (X4)- °^*^' tnUQ, lOUrtn, aUQ 



