CRUSTACEA OF THE MERGUI ARCHIPELAGO. 51 
under surface of the internal lobe of the inferior orbital margin 
is, however, somewhat granular, and the posterior end of the 
subhepatic region, which is situated below the two last antero- 
lateral teeth, is also slightly granular. The anterior part of the 
subhepatic regions and the pterygostomian regions are glabrous, 
but the posterior half of the inflected sides of the cephalothorax 
are a little hairy. The endostome is distinctly longitudinally 
ridged on each side. 
The specimen has unfortunately lost its larger chelipede, so 
that I can only describe the smaller one, the left. The arm 
is almost wholly covered by the cephalothorax, and its outer 
surface is smooth, the upper margin being a little hairy. The 
convex upper surface of the wrist is covered with some pearl- 
shaped granules, which are similar to those of the anterior part. 
of the upper surface of the carapace. The distal end of the 
internal margin of the wrist is somewhat dentiform, and the 
internal surface of this joint is smooth. 
The outer surface of the palm, as well as its upper and under 
margin, is covered with numerous, small, scarcely acute granules 
which are arranged irregularly, but the convex inner surface of 
the palm is smooth. The brownish-coloured fingers are a little 
shorter than the palm. They have pointed, crossing tips. The 
inner edges meet along their whole length; the inner edge 
of the immobile finger is distinctly crenulate, but the same edge 
of the mobile finger appears entire and is only very minutely 
crenulate. The outer surface of the immobile finger is longi- 
tudinally grooved and slightly granular; the mobile finger is also 
longitudinally sulcate on its upper margin and outer surface, 
and covered with granules between the grooves, the granules 
decreasing gradually in size towards the pointed tip. 
The ambulatory legs are short, and, when compared with 
those of other species of this genus, tolerably slender. Their 
outer surface is smooth, but the upper margin of the joints, 
especially of the carpopodites and propodites,is minutely granular, 
and all the joints are slightly hairy along their upper and under 
margins. The dactylopodites are scarcely longer than the pro- 
_ podites, and terminate in rather long, acute, scarcely arcuate, 
corneous tips. 
4,* 
