THE GEAPSOID CEABS OF AMERICA. 



103 



fingers much shorter than palm, a little gaping, tips crossing, im- 

 movable finger nearly horizontal, dactylus Avith a large tooth just 

 behind middle which fits into a corresponding sinus in the propodal 

 finger; this last has a small tooth at base. 



Legs slender, glossy, both margins of merus and dactylus and 

 posterior margins of carpus and propodus pubescent; relative length 

 of legs 2. 3. 1. 4 ; propodites with convex anterior margins, first and 

 fourth pairs with straight, and second and third with concave, pos- 

 terior margin, dactyli curved, much shorter than preceding segment. 

 Abdomen much larger than carapace. 



Color. — Female (49C27),the greater part of the carapace, especially 

 the antero-lateral regions and a broad, longitudinal stripe on the 

 abdomen, are orange chrome in a formalin-preserved specimen; re- 

 mainder of specimen whitish. 



Measurements. — Female (23928), length of carapace 10, width of 

 same 12.5 mm. 



Fjo. 54. — Fabia scbquaduata. «, Vextual vikw ok kuont and mdIjTH, i';Ni>.vw;t;u ; h, bnd 



OF A LEG, ENLABGED. (AFTEK DANA.) 



Habitat. — Commensal in bivalve mollusks. 



Range. — From off Akutan Pass, Alaska, to Laguna Beach, Cali- 

 fornia. To a depth of 45 fathoms. 



Material examined. — 



Off S. entrance to Akutan Pass, Alaska; lat. 53° 5G' N.; long. 

 165^ 5G' W.; 45 fathoms; brk. Sh. P.; temp. 43.5° F.; July 28, 1888; 

 station 2843, Alhatross; 1 female (17480). 



Hammond Bay, Vancouver Island, British Columbia; in 3Iya 

 arenaria; May 20, 191G; C. McLean Fraser; 1 female (49G27). 



Oyster Bay, Washington; from "butter" clam; Dec. 5, 1914; 

 Biological Survey, U. S. Department of Agriculture; 1 female ovig. 

 (coll. Biol. Surv.). 



Pacific Grove, California; from mantle cavity of Mytilus edulis; 

 John C. Brown; 2 females (23928). 



Pacific Grove; 9 females (3 ovig.) and 1 y. female in Mytilus (Mus. 

 Stanford Univ.). 



Laguna Beach, California; William A. Ililton; sent to United 

 States National Museum for identification. 



