THE GEAPSOID CRABS OF AMERICA. 155 



Variations. — Female lacks cardiac ridges; digits longer than in 

 male, longitudinal, and without prehensile teeth. In young male, 

 thumb less deflexed, gape narrower. 



Measurements. — Male cotj'pe, length of carapace 3.7, width of 

 same G.8 mm. Male (Eden Harbor), length of carapace 8.2, width 

 of same 1G.5 mm. 



Rancje. — Corral, Province Valdivia, Chile, to Sandy Point, Straits 

 of Magellan (Cunningham). 



Material examined. — 



Chile : Corral, Province Valdivia ; C. E. Porter ; 3 males, 1 female, 

 cotypes in Mus. Hist. Nat. Valparaiso ; 2 male cotypes in U. S. Nat. 

 Mus. (322G0). 



Eden Harbor, Smith Channel, Straits of Magellan; Hassler 

 Exped., 1 male (5740, M. C. Z.). 



PINNIXA OCCIDENTALIS Rathbnn. 



Plate 34, fig. 1. 



Pinnixa occidcntalis Rathbun, Proc. U. S. Nat. Mus., vol. 16, 1S93, p. 248 

 Ctype-locality, S. of Unimak Island, Alaska, Gl fatlioins; type. Cat. 

 No. 17474, U.S.N.M.), except specimen fx'om San Diego; HaiTiman 

 Alaska Exped., vol. 10, 1004, p. 1S7, pi. 7, fig. 4; pi. 0, figs. G, Go 

 (except specimens fi*om Cape Fox). — Holmes, Occas. Papers Cali- 

 fornia Acad. Sci., vol. 7, 1900, p. SO. 



Pinnixa calif or nicnsis Kathbun, Proc. U. S. Nat. Mus., vol. IG, 1S93, p. 

 249 (type-locality, Monterey Bay, California, 37 fathoms; type, Cat. 

 No. 17478, U.S.N.M.) ; vol. 21, 1898, p. 605; Harriman Alaska Exped., 

 vol. 10, 1904, p. 187, pi. 7, fig. 3. — Holmes, Occas. Papers California 

 Acad. Sci., vol. 7, 1900, p. 90.— Weymouth, Leland Stanford Jr. Univ. 

 Publ., Univ. ser. No, 4, 1910, p. 56 (part; not young female from 

 Pacific Grove). 



Diagnosis. — Cardiac ridge biarcuate. Thumb deflexed. Dactyli 

 of legs styliform. Merus of third leg narrow, from 2| to 3^ times 

 as long as wide. 



Description of male. — Setose. Carapace laterally narrowed, sur- 

 face uneven ; hepatic and gastric regions Avell marked ; on the cardiac 

 region an acute, transverse crest which curves 

 downward and backward in the middle. ^</"^^^^^^^ 

 Median groove of front deep. Antero-lateral /yl-J ^^ / 



margin defined by an acute granulated 1 / <^ ^.....-^p^ 



ridge. ^ {/^ 



Chelipeds stout; manus widening a little fig. 9g. — pixxixa occi- 

 distally, smooth outside, granulated above and dextalis, left chela 



, , -^ • 1 ^ • W *1 1 OF MALE (17470), X 3S. 



below, lower margin nearly straight; thumb 



short, deflexed, a stout tooth at middle, a smaller one near tip; 



dactyl curved, with often, but not always, a tooth near middle. 



