CRUSTACEA OF THE MERGUI ARCHIPELAGO. 23 
are covered with more or less acute granules, a single somewhat 
larger granule being found at the end of the proximal third of 
the anterior margin, and another similar granule at the end of 
_ the proximal third of the upper margin. The wrist, about twice 
as long as broad, is everywhere granular, but does net present 
a tubercle above, as seems to occur in H. albolineata. The larger 
hand resembles that of the last species. The fingers are about 
half as long as the palm, which presents a longitudinal groove on 
its granulated outer surface, close to and parallel with the upper 
margin, and another similar groove below near the under margin ; 
these grooves extend from the articulation with the wrist to the 
fingers. Two similar grooves are found on the equally convex, 
though almost smooth, inner surface of the palm. The fingers 
have acute tips which are perfectly close together ; they are longi- 
tudinally grooved, and the mobile finger is granular on its upper 
margin, and the index also at the base of its outer surface. The 
sharp inner edges are somewhat denticulate. The other cheli- 
pede, which is a little smaller, presents the same characters. 
The ambulatory legs and joints are very similar to those of 
H. albolineata, as regards their shape and length, but the 
meropodites are armed on their upper margins with a row of 
small acute spinules, whereas there is no tooth at the distal 
end of the upper border. 
Dimensions : — 
millim. 
Weneim ofthe cephalothorax <2. .53...+....-.. 63 
Distance between the last antero-lateral teeth.... 91 
Distance between the external orbital angles .... 5 
Length of the larger chelipede ................ 18 
Length of the larger hand (the fingers included).. 84 
Breadth (height) of the palm at the base ofthe fingers. 2 
Harrovia albolineata has been recorded from Borneo, Hong- 
kong, and the Philippine Islands; 4. tuberculata from Australia 
(Darnley Island, Torres Strait). All the species of this inter- 
esting genus are thus inhabitants of the Indian seas. 
