CRUSTACEA OF THE MERGUI ARCHIPELAGO. 239 
finger presents two or three longitudinal rows of small, acute, 
black-pointed spinules; the immobile finger is armed with 
similar spinules, partly arranged in longitudinal series; the 
under surfaces of the fingers are nearly smooth. ‘The cheli- 
pedes are covered with some yellowish hairs, which are more 
numerous on the fingers, and arranged on the latter in small 
transverse tufts, as well on their upper as on their under 
surfaces. 
Each meropodite of the first and second ambulatory legs is 
armed with an acute spinule at the distal end of the under 
margin of its external surface near the articulation; but other- 
wise these joints are unarmed. ‘The carpopodites of the first pair 
of ambulatory legs present a longitudinal row of acute teeth on 
their upper margins, of which the distal one is the largest ; those 
of the second pair are only armed with a single acute spine at 
the distal ends of their upper margins. The propodites are nearly 
quite unarmed, presenting sometimes only a small acute spinule 
at the distal ends of their upper margins. The slender, somewhat 
arcuate dactylopodites of these two pairs of legs are longer 
than the propodites; those of the first pair are once and a 
half as long as the propodites, and those of the second pair 
are somewhat longer still. Their upper margin presents a 
somewhat elevated, smooth, longitudinal ridge ; and the under 
margin is armed with a longitudinal row of 7 or 8 black acute 
spinules along the distal half. The dactylopodites terminate 
in acute black points. The ambulatory legs of the first and 
second pairs are clothed with small tufts of hairs aloug their 
upper and under margins, those of the upper margins of the 
dactylopodites are arranged along the inner side of the longi- 
tudinal ridge. The legs of the two posterior pairs are also very 
hairy. 
The coloration of this species is very characteristic. The 
anterior part of the upper surface of the cephalothorax is of a 
uniform pale colour and is not marked with longitudinal lines, 
though it presents in some specimens a few small red spots. 
The lateral sides of the carapace are a little reddish. The eye- 
peduncles are of a red colour and marked along the inner margins 
of their upper surfaces with a narrow longitudinal pale line, 
proceeding from the cornea to the base; another longitudinal 
pale line proceeds at the outer side of the upper surface, from 
the cornea, gradually tapering till near the base of the peduncle. 
