Genus and Species of Land- Crabs. 191 



equal and slenderer in the female ; their meropodites (which 

 in the male, as in Pelocarcinus Lalandei^ extend much beyond 

 the lateral borders of the carapace, but which in the female 

 liardly reach the level of the brancliial regions) have a few 

 obtuse tubercles on their anterior, and some coarse tubercu- 

 lated squamiform ridges on their posterior angles. The chelse 

 are granulated and ornamented, especially on the fingers, 

 with minute dark-coloured, smooth tubercles ; their toothed 

 prehensile edges meet, in the male, only at the extremities, 

 which are feebly excavated spoon-like ; the margin of the 

 spoon-like excavation in the propodite is notched for the re- 

 ception of the external cutting-edge of the dactylopodite, so 

 as to form scissor-like organs. 



The ambulatory legs are also remarkably powerful ; their 

 meropodites have their edges and sides much roughened by 

 squamiform tuberculation ; the upper crest of their carpopodites 

 is armed with a row of minute spinules ; their propodites have 

 a row of stronger spines on each of their four angles ; and the 

 dactylopodites are provided with six rows of spine-like teeth. 



Colours : upper surface of the carapace and the legs red- 

 violet, the claws whity brown, faintly tinged with reddish 

 violet ; the scars at the extraorbital angles, in" the middle of 

 the branchio-gastric sutui-e, on each side of the mesogastric 

 region, &c., and the margins of the orbits yellow ; the flat 

 posterior portion of the carapace is also much variegated with 

 impure yellow. 



millim. 



Breadth of carapace of the male 108 



Length „ „ „ 80 



therefore B : L : : 1-35 : 1. 



Breadth of carapace of the female 96 



Length „ ., „ 73 



therefore B : L : : 1-315 &c. : 1. 



Length of left claw of male 88 



,, right claw of male 87 



Height of left claw of male 38 



„ right claw of male 38 



Length of left claw of female 55 



„ right claw of female 57 



Height of left claw of female 21| 



„ right claw of female 25 



Length of postabdomen of female 55 



Breadth „ „ „ 51 



Hah. The dark, dense, damp forests of the Nicobar Islands. 

 I captured a male and a female on Treis Island ; another spe- 

 cimen, with a much distorted carapace, was subsequently taken 

 on Narkondam Island by Mr. Allan 0. Hume, C.B., after 

 whom I have named it. 



