. Bulletin - United States National Museum. Science. THE GBAPSOID CRABS OP AMERICA. 361 Maria Cleofa, Tres Marias Islands, Mexico; May 30, 1897; Nelson and Goldman, Biological Survey, U. S. Dept. Agriculture; 1 male (20650). San Benedicto Island, Revilla Gigedo Islands, Mexico; A. W. Anthony; 1 male, 1 female (20G90), 1 male (20G97). Socorro Island, Revilla Gigedo Islands, Mexico; A. W. Anthony; 2 males (20G91).' Acapulco, Mexico (M. C. Z.). Clipperton Island, North Pacific Ocean, west of Costa Rica; J. S. Amheim; 1 male, 1 female (19G4G). Malpelo Island, off Bay of Panama; Alhatrosa; 1 male,
. Bulletin - United States National Museum. Science. THE GBAPSOID CRABS OP AMERICA. 361 Maria Cleofa, Tres Marias Islands, Mexico; May 30, 1897; Nelson and Goldman, Biological Survey, U. S. Dept. Agriculture; 1 male (20650). San Benedicto Island, Revilla Gigedo Islands, Mexico; A. W. Anthony; 1 male, 1 female (20G90), 1 male (20G97). Socorro Island, Revilla Gigedo Islands, Mexico; A. W. Anthony; 2 males (20G91).' Acapulco, Mexico (M. C. Z.). Clipperton Island, North Pacific Ocean, west of Costa Rica; J. S. Amheim; 1 male, 1 female (19G4G). Malpelo Island, off Bay of Panama; Alhatrosa; 1 male, holotype of G. malpilensis (4492, M. C. Z.). GECARaNUS LAGOSTOMA Milne Edwards. Plates 125 and 12a (lecarcinus lagostoma Milne Edwakds, in Fremlnville, Ann. Sci. Nat., ser. 2, vol. 3, 1835, p. 218, footnote; Mauritius (nornen nudutn) ; Nat Crust., vol. 2, 1837, p. 27 (, Australasia;' type in Paris Mus.).—Stehbing, Hist. Crustacea, 1893, p. 84, pi. 2. Oecarcinus ruricola Gkeeff, Sitzsungsb. Ges. Jlarburg, 1882, p. 26; not G. rtiricola (Linnaeus).—Osouio, .Tor. Sci. Lisboa, ser. 2, vol. 5, 1S9S, pp. 185 and 192; not G. ruricola (Linnaeus). Gecarcinns lagostoina (?) Miees, Challenger Rept, Zool., vol. 17, 1886, p. 218, pi. 18, figs. 2-2c. Diagnosis.—Large. Maxillipeds cover epistome and antennular cavities; merus suboval, with an antero-internal fissure. CheliiDeds subequal. Dactyli of legs with six rows of spines. Description.—The dorsal aspect of the carapace is much like that of G. ruricola. The fronto-orbital distance is in the adult male three-eighths, in the half grown male less than half, the entire width of the carapace; the front is wider and the orbits narrower than in ruricola. The height of the orbit is about three-fourths of its width. The outer maxillipeds touch the front, fitting snugly over the anten- nular cavities; they are narrower, and at the middle project less outwardly than in ruricola; the merus is rounded at the end as in that
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