THE GRAPSOID CEABS OP AMERICA. 



163 



Variations. In the fully developed male the chela is much higher 

 in proportion to its length than in the female, its margins straighter, 

 surface nongranulate, the thumb very short, the dactylus bent in an 

 obliquely vertical direction, prehensile edges each obscurely biden- 

 tate. Abdomen suboblong, its sides slightly convex. 



There are males in which the chelae are similar to those of the 

 female, that is, swollen, granulate, thumb only a little shorter than 

 dactylus ; they differ from those of the female in being more swollen 

 and dactylus shorter. 



There is some variation (1} in the width of the legs, but as they 

 are of the same general shape, I am disposed to think that the speci- 

 mens listed below are all of one species; (2) in the length and promi- 

 nence of the granulate, antero-lateral ridge; (3) in the inequalities 

 of the dorsal surface of the carapace. 



Measurements. Female holotype, length of carapace 5, width of 

 same 8.5, length of third leg about 9.7 mm. Male (25850), length 



a b c 



FIG. 101. PlNNIXA SCHMITTI, MALE (25850). O, OUTER MAXILLIPED, X 15 J ; ft, ABDO- 

 MEN, X 71 ; C, LEFT OE LARGER CHELA, X 7. 



of carapace 5, width of same 9.2, length of third leg about 10 mm. 



Range. Port Levasheff, Alaska, to San Francisco Bay, California. 

 7 to 80 fathoms. 



Material examined. Port Levasheff, Unalaska, Alaska; 70 to 80 

 fathoms; M. St.; W. H. Dall; 1 male (48440). Left chela with 

 medium thumb and slightly gaping fingers, right chela with long 

 thumb and nongaping fingers, both palms granulate. 



Cape Fox, Alaska ; W. R. Coe, Harriman Exped. ; 3 males, 1 female 

 (25850). 2 males have short thumb, gaping fingers and smooth 

 palm; smallest male has medium thumb, nongaping fingers and 

 granulate palm ; female without chelae. 



Puget Sound; 1908; 1 male, 1 female (Stanford Univ.). Small; 

 male with medium thumbs, gaping fingers and granulate palm; 

 female with long thumbs and granulate palm. 



Upper San Francisco Bay, Cal., 9 to 13 fathoms; fne. dk. 

 gy. S. sft. gy. M.; temp. 13.29 C.; Feb. 28, 1912; station 5715, 

 Albatross; 1 male (48442). With longish thumbs, nongaping fin- 

 gers and granulate palms. 



