234 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



Genus LEPTOGRAPSUS Milne Edwards. 



Leptograpsns (part), JIilne Edwards, Ann. Sci. Nat., ser. 3, Zool., vol. 20, 

 1S53, p. 171 [137] ; type, L. variegatus (Fabricius). 



Differs from Grapsus as follows: 



Region not strongly defined. Lateral borders armed with two 

 teeth behind the orbital angle. Front moderately deflexed, its su- 

 perior tubercles not prominent. 



The tooth projecting from the lower wall of the inner fossa of the 

 orbit is small, and the hiatus is largely filled by the greatly expanded 

 first movable segment of the antenna. Epistome short fore and aft, 

 laterally not nearly reaching the orbit. Merus of outer maxillipeds 

 shorter and broader than the ischium, and as broad as it is long. 



Chelipeds in the male much stouter than the legs. Tips of fingers 

 hollowed out in shallow spoons. 



Contains only one species. 



LEPTOGRAPSUS VARIEGATUS (Fabricics). 



Plate 56. 



Cancer variegatus FABRicrus, Entom. Syst., vol. 2, 1793, p. 450 (type- 

 locality, in Amcricae meridionalis Insulis; type not extant). 



Grapsus variegatus Latreille, Hist. Nat. Crust., vol. 6, an XI [1802- 

 1803], p. 71. 



Orapsus personatus Lamarck, Hist. Nat. Anira. sans Vert., vol. 5, 1818, p. 

 249 (type-locality. New Holland; type in Paris Mus.). 



Grapsus strigilatus White, in Gray, Zool. Miscellany, June, 1842, p. 78 

 (type-locality. New Zealand). 



Grapsus planifrons Dana, Proc. Acad. Nat. Sci. Pliiladelphia. vol. 5, 1851, 

 p. 249 (type-locality, ad oras juxta urhem 'Valparaiso'; Cat. No. 

 2343, U.S.N.M.) ; U. S. Expl. Exped., vol. 13, Crust, pt. 1, 1852, p. 338; 

 atlas, 1855, pi. 21. figs. 3a^3e. 



Leptograpsus variegatus Milne Edwabds, Ann. Sci. Nat., ser. 3, Zool., vol. 

 20, 1853, p. 171 [137]. 



Leptograpsus verreauxi Milne Edwards, Ann. Sci. Nat., ser. 3, Zool., vol. 

 20, 1853, p. 171 [137], (type-locality, Australie; type in Paris Mus.). 



Leptograpsus ansoni Milne Edwards, Ann. Sci. Nat., ser. 3, Zool., vol. 20, 

 1853, p. 171 [137], (type-locality, He de Juan-Fernandez ; type in Paris 

 Mus.).— DE Man, Notes Leyden Mus., vol. 12, 1890, p. 84. 



Leptograpsus gayi Milne Edwards, Ann. Sci. Nat., ser. 3. Zool., vol. 30, 

 1853, p. 171 [137], (t.vpe-locality, Chili; type in Paris Mus.). 



Diagnosis. — Subcircular. Two side teeth. Fingers spoon-shaped. 

 Merus of maxillipeds as broad as long. 



Description. — Carapace subcircular. Surface of front and ante- 

 rior gastric region tuberculate. Surface between transverse and 

 oblique ridges very finely reticulate. Edge of front transverse, 

 crenate. The three teeth of the sides diminish in size from the 

 orbital tooth backward. 



