Genus and Species of Land- Grabs. 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 

 hardly reach the level of the branchial 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 suture, on each side of the nasogastric 

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

 posterior portion of the carapace is also much variegated with 



impure yellow. 



ruilliui. 



Breadth of carapace of the male 108 



Length „ „ „ 80 



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



Breadth of carapace of the female 96 



LeDgth „ „ „ 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 



Hob. 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 O. Hume, C.B., after 

 whom I have named it. 



