THE GKAPSOID 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 cotype, 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. 



Range. 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. 

 Mtis. (322GO). 



Eden Harbor, Smith Channel, Straits of Magellan; flossier 

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



PINNIXA OCCIDENTALS Rathbun. 



Plate 34, fig. 1. 



Pinnixa occidcntalis RATHBUN, Proc. U. S. Nat. Mus., vol. 16, 1893, p. 248 

 (type-locality, S. of Unimak Island, Alaska, Gl fathoms; type, Cat 

 No. 17474, U.S.N.M.), except specimen from San Diego; Harriman 

 Alaska Exped., vol. 10, 1904, p. 187, pi. 7, fig. 4; pi. 9, figs. C, Go 

 (except specimens from Cape Fox). HOLMES, Occas. Papers Cali- 

 fornia Acad. Sci., vol. 7, 1900, p. 89. 



Pinnixa californiensis RATHBUN, Proc. U. S. Nat. Mus., vol. 16, 1893, 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. Uuiv. 

 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 3J times 

 as long as wide. 



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

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

 region an acute, transverse crest which curves 

 downward and backward in the middle. 

 Median groove of front deep. Antero-lateral 

 margin defined by an acute granulated 

 ridge. 



Chelipeds stout; manus widening a little FIG. 90. PIXXIXA occi- 

 distally, smooth outside, granulated above and DEXTAMS, LEFT CHELA 



J ' . OF MALE (174701, X 3J. 



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. 



