APPENDIX. 337 



and legs smooth, of a rich red colour. Length of Carapace, 

 1 inch 4 lines. Breadth, 2 inches, 4 lines. 



Hab. — Indian Ocean, and Eastern Seas. 



This species is more transverse than any of the described 

 species of Carpilius, and from its habit, &c. may hereafter 

 constitute a distinct subgenus, when one or more allied 

 species are discovered. 



Genus. XANTHO, Leach. 



Xantho deplanatus. White, I. c. p. 17. 



Carapace above smooth, and very much depressed : 

 latero-anterior part very short, ending in a tooth, between 

 which and the outer orbit are three lobes which are slightly 

 rugose : front rather straight, with four slight lobes and a 

 transverse line. Forelegs different in size and shape, the 

 wrist with a curved impressed line on the outside. Legs 

 hairy. 



Hab. — Garden Island, Sydney. 



Family GRAPSIDiE. 



Genus. Grapsus Auct. 



Grapsus latifrons. White, L c. p. 40. 



Plate 2. figure 2. 



Carapace and legs mottled with yellow and reddish 

 browns, much as in the Grapsus messor. Carapace consider- 

 ably wider in front than behind, the frontal part very wide, 

 longer than the side of the carapace, the edge dilated, 

 straight and crenated — above this dilated edge are four 

 slight transverse lobes, occupying the whole extent of the 

 front, the two side ones longest, with several irregular warts 

 in front : outer angle of eye sharp, spined — behind this an 

 oblique groove on each side. Legs very long and flat. 



Hab. — Eastern Seas, Singapore. 



This species constitutes a well marked section of the 



VOL. II. z 



