THE SPIDER CRABS OF AMERICA 177 



directed obliquely outward. It a;id the antero-lateral tooth are 

 narrow. Postero-laterai spine or tubercle longer than in P. gracilis. 



On the basal article of the antenna there is a tubercle on the outer 

 margin near the posterior end. The merus and carpus of the cheli- 

 peds are bluntly ridged, the merus tuberculate above, especially at 

 proximal end. Ambulatory legs more slender and CAdindrical than 

 in P. gracilis. 



Color. — Red, varying from bright to dark, and often closely 

 matching certain of the encrusting corallines (Weymouth). 



Measurements. — Male (23921), length of carapace to end of horn 

 40.6, width 33 mm. 



Range. — From Clayoquot Sound, Vancouver Island, British 

 Columbia, to San Diego Bay, California. From between tides to 50 

 fathoms. 



Material examined. — 



BRITISH COLUMBIA 



Ucluelet; low tide to deep water; Geol. Survey of Canada; 1 male 

 (40067). 



Barclay Sound; September 27, 1888; Albatross; 1 male, 2 females 

 (15572). 



Victoria; Dr. C. F. Newcombe (specimens returned to sender). 



WASHINGTON 



Dockton, Puget Sound; May 11, 1906; Albatross; 1 male (46527). 



CALIFORNIA 



Humboldt Bay; July IS, 1916; Scripps Inst.; 1 female, returned to 

 sender. 



Mendocino; May, 1860; A. Agassiz; 1 female, with P. gracilis 

 (999, M.. C. Z.). 



Monterey Bay; Albatross; 1 male (15573). Under rocks and among 

 algae about mean and low tide marks; 1898; Harold Heath; 1 male, 

 3 females (22873). 



Monterey; Henry Hemphill; 1 male (2276), 1 young (21371). 

 1880; D. Sl Jordan; 1 male, 2 females (3058). 



Pacific Grove: July, 1895; J. O. Snyder; 1 male (19814). John C. 

 Brown; 15 specimens (23921). 1918; T. S. Oldroyd; 5 males, 2 

 females (1 ovig.) (54008). 



Venice, Santa Monica Bay; from Venice Mar. Biol. Sta.: February 

 2, 1911; Anton Dohrn, P. S. Barnhart; 2 males, 2 females (50172). 

 Under Venice Ac[uarium; 1 male, 1 female (45582). Venice Break- 

 water; October 16, 1913; Anton Dohrn, P. S. Barnhart; 1 male (50175). 

 Off Venice; August 2, 1913; Anton Dolirn; 2 males, 1 female (50173). 



