CRUSTACEA OF THE MERGUI ARCHIPELAGO. 223 
outersurface, and are fringed along their inner margins with long 
hairs, those of the last three joints being very long. The abdomen 
is very long, even much longer than the carapace. 
The anterior legs are somewhat unequal, the right being the 
larger. Except the basipodites, ischiopodites, and the base of the 
meropodites, the chelipedes are thickly clothed with hairs on their 
outer (upper) surface, and quite smooth and glabrous on their 
inner (under) surface, agreeing in this character with P. transversa. 
The anterior legs resemble somewhat those of P. picta, Stimps. 
The upper surface of the meropodite is convex and smooth, 
though marked with some delicate transverse lines on the distal 
half, which, however, are only visible by means of a magnifying- 
glass ; this joint, the upper surface of which is densely hairy, except 
at its base, is armed with a prominent, rounded, minutely denti- 
culate lobe at the distal end of its anterior margin. The wrist 
is scarcely twice as long as the merus-joint, and its upper 
surface is once‘and a halfas long as broad; the inner or anterior 
margin is entire, scarcely arcuate, aud projects in the form of 
a crest, almost as in P. transversa. The upper surface of the 
wrist is smooth, though minutely punctate, and is everywhere 
thickly clothed with hairs ; the posterior margin is also entire. 
When the fingers are included, the hand is scarcely twice as 
long as the wrist. The fingers are comparatively short, being 
scarcely half as long as the palm, and the hand, including the 
fingers, is rather slender, being three times as long as high. 
The outer surface of the palm is smooth, although minutely 
punctate and densely hairy; the under or inner surface is 
convex, smooth, and glabrous. As in P. transversa, the lower 
border of the palm is marked with a minutely granulated line 
runving to the end of the immobile finger; this granulated 
line, however, is scarcely visible to the naked eye. The fingers 
are densely hairy externally, and smooth and glabrous internally, 
except near their internal edges; they have arcuate pvinted 
tips, which slightly cross one another. The lower border of 
the immobile finger forms a continuous straight line with the 
lower border.of the palm, this finger not being deflexed. 
The external margin of the cutting-surface of the immobile 
finger is faintly crenulate and presents a small prominence 
a little beyond the middle; a conical tooth, however, is not found 
at the base of the cutting-surface, which is flattened or even 
slightly concave. The mobile finger is somewhat rugose or 
