CRUSTACEA OF THE MERGUI ARCHIPELAGO. 297 
coast only three or four small teeth are present. In Haswell’s 
specimens of C. terre-regine, preserved in spirit, the chelipedes 
were green, the fingers colourless; the propodites of the 
ambulatory legs were light dull red, the basal portion of the 
dactylopodites being dark purple, the distal portion light yellow 
with a black tip, whereas the rest of the surface was washed with 
light brown and olive. In the Mergui specimen, also preserved 
in alcohol, we find the following coloration :—The anterior 
calcified portion of the upper surface of the cephalothorax is 
of a fine red colour (a mixture of crimson with rough sienna), 
the minute scattered punctations, especially of the poste- 
rior half, being of a yellowish colour; on each side of the 
median frontal tooth the frontal margin appears white for a 
short distance, the external angles presenting again the red 
colour. The external antenne are of a beautiful saffron-colour, 
like the eye-peduncles ; but the latter are more reddish-coloured 
on the basal halves of their upper surfaces, and are provided 
with a milk-white ring immediately before the cornea. The legs 
present the same red colour as the gastric region of the cephalo- 
thorax; but the carpopodites and the hands of the chelipedes and 
the last three joints of the legs of the second and third pair are 
of a darker red; the spoon-like excavated tips of the fingers and 
the small acute spines at the distal ends of the upper margin of 
the carpopodites are of a white colour. The minute scattered 
punctations on the legs are equally white, and the dactylopodites 
of the legs of the second and third pairs have black tips. I may 
add that the basipodites of all the legs are marked on their under 
surfaces with an oval yellowish spot. 
New researches will have to decide whether the colora- 
tion of the species of the genus Calcinus is constant or variable. 
Perhaps the coloration of the same species will prove to be 
different in different localities. 
Perhaps even Haswell’s species may prove to be a colour- 
variety of Heller’s Calcinus nitidus from Tahiti. 
The cephalothorax of this specimen is 18 millim. long, its 
anterior margin 4 millim. broad, and the eye-peduncles are 
64 millim. long. I may add that the last two joints of the 
3 legs of the third pair are provided with many tufts of long hairs 
along their under margins, as in Calcinus Gaimardi from Amboina. 
15* 
