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) ; Hi.st. Nat 

 Crust., vol. 2, 1837, p. 27 (type-localit.v, 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 species, but on the antero-internal edge has a deep fissure, closed 

 by the overlapping of the proximal edge of the slit on the distal edge. 



Fig. 164. — GECAncixus l.v.oos- 



TOMA, OUTEIt M A X I L L I r E D, 



AscExsio.N' Island, slioiitly 

 KEDUCED. a, L'ri'Eit view; b, 

 LOWEu VIEW. (After Mieus.) 



»Bouvier (Bull. Mus. Hist. Nat, Tarls, 1000, p. 498) considers this locality erroneous. 



