292 Records of the Indian Museum. [VOEs We 
ness; as in P. id@ and P. sulcatus, the tooth on the immobile 
finger is acute and the proximal tooth on the mobile finger is 
smaller than the distal one; when the fingers are closed the first 
of these teeth fits between the other two; the crenation of the 
ridge of the immobile finger, proximal to its basal tooth, is more 
prominent than in P.7d@ and P. sulcatus. A tow of from 15 to 
20 tubercles exists on each side of the median ridge of both fingers, 
and is exposed on removal of the pubescence; sometimes it is found 
only on one side of the ridge; this character and the pubescence 
on the chelipedes are distinctive of the present species. The 
following measurements are taken from the large chelipedes of a 
specimen measuring I17 mm. in total length :— 
Total length a: m. cE p- i 
185 20 35 55 40 35 
169 18 32 50 40 29 
From the above measurements it will be seen that the joints 
of both chelipedes have about the same relative lengths, but unlike 
P.id@ the carpus is shorter than the propodus and the fingers 
are relatively longer. 
The telson is similar to that of P. 7d@, the inner sub-terminal 
spinule on each side projecting beyond the tip of the telson by about 
half its length; the much shorter outer lateral spinule does not 
reach the tip. 
The carapace is slightly scabrous anteriorly ; the rest of the 
body is merely punctate. 
Characters of females.—The rostrum is slightly longer than 
that of the male; it may extend as far as, or slightly beyond, the 
distal margin of the antennal squame. 
The large chelipedes are punctate, sub-equal, and about 
two-thirds the length of the body. The tubercles on each side 
of the finger-ridges are poorly developed or even absent. The 
middle of the palm is sometimes wider than the extremities, in 
which case it is wider than the distal portion of the carpus. Ina 
specimen measuring 86 mm. in total length, the joint-measure- 
ments are as follows :— 
1cO\ Cia, OR. Cl glO ma kO get. ts 
The females of the present species may easily be mistaken for 
those of P. ide, but the rostrum differs from that of the latter 
species in possessing a moderate proximal convexity. In P. ide 
the proximal portion is very slightly convex or even almost 
straight. The upper rostral teeth are also larger and placed further 
apart than in P. ide. 
Characters of the young.—The rostrum is sometimes upturned 
distally as in P.zd@; it may extend a little beyond the distal 
margin of the antennal squame as in females. The proximal 
portion of the carpus is extremely slender. The proximal portion 
of the palm is as wide as the distal portion of the carpus. 
The palm widens towards its middle, so that its inner surface 
