IQgr6. | S. Kemp: Notes on Crustacea Decapoda. a7 
chela is articulated, as in P. candidus, and not fixed as in most 
species of the genus. 
The second peraeopods (text-fig. 5d) reach little beyond the 
end of the merus of the first pair. The merus is one third longer 
than the ischium and more than twice the length of the carpus. 
The dactylus is longer than the palm and conspicuously longer 
than the fixed finger, the fingers are of equal breadth and each 
bears a single stout seta at its apex. The whole limb is rather 
thickly clothed with hairs. 
The slender third peraeopods reach beyond the end of the 
antennal scale. The carpus is a little longer than the merus and 
as long as the propodus and dactylus combined. The fourth and 
fifth peraeopods are shorter than the third. In the fifth pair the 
dactylus and propodus are subequal; the carpus is a little longer 
than the propodus and a little shorter than the merus. 
- In the male the last three segments of the thoracic sternum 
are carinate, the carina of each ending anteriorly in a small tooth. 
These carinae and teeth do not appear to exist in the female and 
in neither sex is there a sternal spine extending between the bases 
of the third legs. 
The abdominal somites are smooth, without sculpture or 
pubescence; their pleura are rounded inferiorly. In the male the 
endopod of each of the last four pairs of pleopods is comparatively 
well developed and possesses an appendix interna. In the female 
there is no appendix interna and the endopod is very small in the 
second and third pairs, quite rudimentary on the fourth and absent 
from the fifth. 
The telson, including the terminal spines, reaches a little be- 
yond the end of the inner uropod. It is not sulcate above and 
bears two pairs of lateral spinules between which are two rows of 
exceedingly minute denticles. These denticles can only be seen if 
the telson is viewed obliquely from the side under a microscope ; 
they extend from the base almost to the distal end and may be as 
many as sixteen in number. The apex is closely similar to that 
of P. incisus. 
The outer uropod is shorter than the inner. It bears setae on 
its external margin and is fully three and a half times as long as 
broad. 
The largest of the nine specimens obtained is only 6 mm. in 
length. No ovigerous females were found and it is possible, there- 
fore, that all are immature. The characters are, however, quite 
distinctive and experience with other species leads me to believe 
that they would not change appreciably with further growth. The 
specimens were pale in life with sparse black dendritic chromato- 
phores, 
£156 Port Blair, Andamans, 2 fms. S. Kemp. 9, 44-6 mm. TyYPEs. 
The specimens were all found together in Phoenix Bay on a 
bottom of muddy sand. 
