CRirSTACEA OP THE MEEGUI AECHIPELAGO. 229 



antennae. They are much shorter than the anterior margin of 

 the carapace, and are a little dilsrted towards the cornea ; each 

 peduncle is marked on its upper surface with two longitudinal, 

 reddish-brown lines. The external antennae are very hairy. 

 The basal joint of each peduncle, which projects nearly as far 

 forwards as the two triangular prominences of the anterior margin 

 of the carapace, presents a few small spinules on its anterior 

 margin. The next joint, which extends almost as far forwards as 

 the acute tip of the rostrum, is armed with a short spine at 

 the external angle of its anterior margin, but this spine is 

 not represented in Milne -Edwards's figure (J. c. pi. xiv. fig. 2). 

 The next or penultimate joint is provided at the base of its 

 upper surface with a small scale which terminates in two spines, 

 which much resemble those in Milne-Edwards's figure, the longer 

 external spine projecting a little beyond the distal end of the 

 penultimate joint, whereas the shorter internal spine scarcely 

 projects so far forwards. As in the same figure, the inner margins 

 of these spines are also spiniferous ; but the spinules are more 

 numerous in the Mergui specimens, for in them the external 

 spine is armed with five, and the internal spine with three 

 spinules. 



As the foremost of the already described transverse, piliferous, 

 elevated lines on the anterior part of the cephalothorax are 

 minutely spinulose, this region appears somewhat hairy. The 

 anterior margin also is armed with some small spinules between 

 the two lateral spinulose prominences, and some small spinules 

 occur at its external angles. The surface behind the cervical 

 suture is also covered with many long hairs. 



The left chelipede is much larger than the right. The arcuate, 

 hairy, upper and internal margin of the meropodite of the 

 larger chelipede is armed with 13-14 small acute spines, all of 

 which are directed forwards ; the anterior margin of the upper and 

 external surface is also hairy, and presents a similar number of 

 small spinules, which gradually diminish somewhat in size from 

 the internal to the external angle. This somewhat hairy outer 

 surface of the mex'opodite is almost wholly flattened and 

 smooth, presenting only some small piliferous spinules and 

 elevated lines on its upper part, in the angle between the 

 anterior and the upper internal margins, and a few pili- 

 ferous elevated lines near the distal end of the under and 

 external margin. These groups of piliferous lines are united 



