CETISTACEA OF THE MERGTJI AECHIPELAGO. 235 



or six spinules, and the internal with two. The eye-peduncles 

 are marked with similar reddish-brown lines to those apparent 

 in D. mergidensis. 



The legs much resemble those of the latter species, so that I 

 wiU only describe their distinctive characters. The meropodite of 

 the larger chelipede is quite similar to that of B. merguiensis. 

 Also as regards the carpopodite, both species nearly agree with 

 one another, but in B. miles the tubercles of the upper surface 

 are somewhat more numerous, smaller, and less piliferous; 

 as in B. merguiensis, two parallel rows of somewhat larger 

 acute spinules are found along the inner margin of the upper 

 surface. As regards its shape and form, the larger hand 

 is quite similar to that of B. merguiensis; its outer surface, 

 however, is covered, in the Mergui specimen, with much more 

 numerous, much smaller, and quite glabrous granules. In both 

 species the lower margin of the immobile finger makes a straight 

 line with the lower margin of the palm. Towards the upper 

 margin, aud near the articulation with the wrist, these granules 

 n^-s\ '^er are slightly larger and acute, and the upper margin of 

 the palm presents two parallel rows of acute spinules, much as 

 in B. merguiensis. The inner surface of the palm is a little 

 granular and hairy in the middle, being armed with a few 

 sparsely distributed small granules ; near the upper margin it 

 presents some acute spinules, and the under surface or margin 

 of the palm is also a little more coarsely granulated. The outer 

 surface of the fingers is covered with much more numerous and 

 much smaller granules than in B. merguiensis, and their inner 

 margins are more distinctly dentate. The granules of the fingers, 

 like those of the outer surface of the palm, are not piliferous 

 but quite glabrous. As in B. merguiensis, the inner margins of 

 the fingers on both sides of the teeth present some small tufts 

 of hairs. The upper margin of the mobile finger likewise presents 

 two parallel rows of acute granules, those of the external being 

 much larger than those of the internal row ; these granules 

 however, are much smaller in B. miles than in B. merguiensis in 

 which they are more spiniform ; they are also more numerous 

 the external row consisting of about 30 granules, whereas in 

 B. merguiensis there are only 16 or 17. They gradually diminish 

 in size towards the pointed, hooked tip. The upper maro-ia pre- 

 sents some few hairs. On the middle of the smooth inner surface 

 of the thumb some small granules are observed, more numerous 



