THE GRAPSOID CRABS OF AMERICA. 



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Chelipeds gramilute; a sharp spine near sum- 

 mit of merus; a blunt tooth on carpus. The 

 coarser granulation of the hand is arranged in 

 longitudinal rows. No large basal tooth on dac- 

 tylus of larger hand. 

 * Otherwise as in S. carolinensis. 



Measurements. — M-dle holotype, length of 

 carapace 17, width of same 21 mm. 



Kange.—Tacihc and Gulf coasts of Lower 

 California ; 23-33 fathoms. 



SPEOCARCINUS OSTREARICOLA Bathban. 



Plate 10, fig. 1. 



Speoearcinus ostrearicola Rathbun, Proc. U. S. 

 Kat. Mus., vol. 38, 1910, p. 54.5, pi. 48, fig. 2 

 Capon), Peru; holotype male. Cat. No. 404G9, 

 (type-locality, oyster beds of Matapalo (near 

 U.S.N.M.). 

 Diagnosis.— ^yestnlks constricted. Antero- 

 lateral teeth four, well-marked. Chelipeds 



nearly smooth. . 



Description.— Body and legs coarsely hairy; 

 carapace very broad, coarsely granulate; re- 

 o-ions fairly well marked. Antero-lateral mar- 

 Sin cut by broad V-shaped notches into four 

 well-marked teeth. Front one-fourth as wide 

 as carapace, having a deep median furrow; 

 edge bilobed, lobes arcuate. Eyestalks distally 

 slender, corneae somewhat enlarged. 



Chelipeds unequal, broad, nearly smooth; a 

 tooth on upper edge of arm and inner edge of 

 wrist; palm high, upper margin granulate; hn- 

 gers narrowly gaping, - inner margins irregu- 

 larly dentate; upper margin of dactylus granu- 

 late, immovable finger with a raised, granulate 

 ridge just above lower edge. 



Measurements. -Male holotype, length of 

 carapace 12, width of same 17.6 mm. 



Ranqe.-Knov^n only from the type-speci- 

 men, from the oyster beds of Matapalo (near 

 Capon), Peru; Jan. 23, 1908; R. E. Coker; 

 1 male, received from the Peruvian Government 

 (404G9). 



