CiMJSTACEi. OF THE MERGTJI AECHIPELAGO. 227 



coast only three or four small teeth are present. In Haswell's 

 specimens of C. terrm-regince, 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 autennge are of a beautiful safiron-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 aud 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 Galcinus 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 13 millim. long, its 

 anterior margin 4 millim. broad, and the eye-peduncles are 

 6| millim. long. I may add that the last two joints of the 

 legs of the third pair are provided with many tufts of long hairs 

 along their under margins, as in Calcinus Gaimardi from Amboina. 



15* 



