194 PROCEEDINGS OF THE ACADEMY OF [1880. 



Is distinguished from the typical forms of G. maculatus only 

 by the hairy carapax and nieral joints of the ambulatory limbs, 

 and the narrower carpal spine. All other characters Avhich have 

 been given prove inconstant. Dr. Martens, by an examination of 

 Herbst's type, has shown the identity of Herbst's teniiicriatafus, 

 and Edwards' rudis. 



Hfiwaian Is.! (J. K. Townseiid, Randall's type) ; OoJiu! (Dr. W. 

 H. Jones) ; Ceylon (Heller) ; Bonin (Stm.). 



G. Strigosus Latreille ex Herbst. 



Cancer strigosus Herbst, PL XLVII, f. 7 (17991. 



Orapsus strigosus Latr., Hist. Crust, et Ins., vi, p. 70 (1803-4). 



Grapsus alboUneatus Lamarck, Hist. Animaux sans Vertebres, v, p. 



249(1817). 

 Ooniopsis strigosus De Haan, Fauna Japonica Crust., p. 33 (1835). 

 Grcqysus granrtlosus, peronii et pelagicus Edw., Ann. Sci. Nat., Ill, 



XX. p. 169 (1853). . 



Grapsus longipes et suhquadratus Stimpson, Proc. Acad. Nat. Sci. 



Philadelphia, 1858, pp. 102 et 103. 



Carapax but little convex, posteriori}' with oblique transverse 

 lines, anteriorly with sqnamiform tubercles. Frontal lobes mod- 

 erate, frontal margin crenulate. Orbits with a deep fissure below. 

 Epistome short. Meros spined anteriorly, its other margins 

 rounded, the posterior surface with transverse rugae- Carpus 

 granulate and bearing internally a slender spine. Hands much 

 as in G. maculatus. Posterior distal angle of meros of last pair 

 of ambulatory feet denticulate. 



Natal! Australia! (Dr. T. B. Wilson) ; Sandtdch Is.! (in Peabody 

 Acad.). Its distribution is embraced within the above limits and 

 Hong Kong (Stimpson). 



G. gracilipes Milne-Edwards. 



Grapsus gracilipes Edw., Ann. Sci. Nat., Ill, xx, p. 168 (1853). 



China (Edwards). 



Subgenus Orthograpsus, nov. 

 Carapax transverse, broadest behind. Sides straight, with one 

 tooth behind the orbital angle. Antennas entering the orbit. 

 Fingers of chelipeds acute. 



0. hillii nov. 



Carapax depressed, plications faint. Supra-frontal lobes mod- 

 erate ; front straight, narrow, deflexed. Sides of carapax straight, 

 post-orbital tooth small. Meros of external maxilliped a little 



