1889.] NATURAL SCIENCES OF PHILADELPHIA. 201 



Carapax broader than long, everywhere crossed b}' plications 

 which are bordered by short hairs ; frontal lobes prominent, front 

 sinuate. Sides of carapax entire. Meros and carpus of chelipeds 

 externally' plicate, inner margin of meros expanded, proximally 

 denticulate distall^- with spiniform teeth. Carpus Avith a promi- 

 nent internal spine. Hand and dactjdus granulate above, exter- 

 nally the hand bears several longitudinal rugie. Fingers short, 

 gaping, extremities excavate. 



Oahu! (Dr. W. H. Jones); Tafdti! (A. Garrett, Peab. Acad.); New 

 Caledonia; Samoan Is. (A. M.-Edw.j^ Natal (Krauss); Loo Choo 

 (Stimpson). 



P. marmoratus Stimpson ex Fabriciup. 



Cancer marmoratus Fabrieius, Ent. Syst., ii, p. 4.')0 (1793). 

 Grapsus varius Latreille, Hist. Crust, et Ins. vi, p. 69 (180;3-4i. 

 Grapsus marmoratus Desmorest, Considerations, p. 131 (1825). 

 Leptograp«us marmoratus Edw., Ann. Sci. Nat. Ill, xx, p. 171 (1853). 

 Pachygrapsus marmoratus Stimpson, Proc Acad. Nat. Sci. Pliila., 

 1858, p. 102. 



Carapax depressed, naked, transversely plicate; frontal lobes 

 prominent, front depressed, slightlv arcuate, or sometimes a 

 little sinuate. Sides with two teeth behind the angle of the 

 orbit. Meros of chelipeds expanded in front, expansion distally 

 truncate and dentate. Carpus and hand tuberculate above, the 

 former with a prominent internal tooth. Fingers slightly exca- 

 vate. Posterior distal angle of meros of last pair of feet rounded, 



entire. 



France!. (Guerin) ; Bospliorus ! (Smithsonian) ; Mediterranean ( Auct. ) ; 

 Madeira (Stm.). 



P. pubescens Heller. 



Pachygrapsus pubescens Heller, Novara Crust, p. 45, PI. IV, f. 4 (1865). 



CMU (Heller). 

 P. minutus A. M. -Edwards. 



Pachygrapsus minutus A. M.-Edw., Nouv. Arch du Mus., ix, p. 292, 

 PI. XIV, f. 2(1873). 



New Caledonia (A. M.-Edw.). 

 P. simplex Kingsley ex Herklots. 



Grapsus simplex Herklots, Additamenta, etc., p. 9, PI. I, f, 8 (1851). 



Boutry, West Coast of Africa (Kevklot^). 



Genus NAUTILOGRAPSITS Edwards {Planes BelP). 



Carapax narrow, regularl}' arcuate, sides slightly convex, and 

 bearing a rudimentary tooth behind the orbital angle. Front 



' The genus Planes is a MS. one of Leach. Bowdich, in his " Excursion 

 to Madeira and Porto Santo," p. 15, f. 2 (1825), figui-es and mentions a spe- 

 14 



