CRUSTACEA OF THE MERGUI ARCHIPELAGO. 267 
Mr. Miers has not only given a new description of this species 
in his report, but he has also made many interesting remarks on 
its variations. I have therefore little to add to what has been 
said by him. In the typical specimens the second joint of the 
carpopodite of the second leg is precisely half as long as the first 
joint, or scarcely exceeds half the length of the latter, as is proved 
by the following measurements, which express in millimetres the 
length of these joints in eight specimens :— 
Mergui Specimens. 
Male specimens. Female specimens. 
Whole length é Whole length : 
ee First Second opens First Second 
carpopodite. io. a carpopodite. jg wea 
74 33 ile 8 32 14 
6 2+ Ih 64 a4 12 
1 
64 24 1s 
5t 2 i 
Red-Sea specimens. 
6} 25 1 | 63 O14 1: 
A variety sometimes occurs, in which the second joint is scarcely 
shorter than the first, as is proved by the following two female 
specimens, from the Mergui Archipelago :— 
Whole length of 
the carpopodite. First joint. _ Second joint. 
14 44 4.4 
qj 22 ol 
It was a specimen belonging to this variety which was figured 
in the ‘ Novara Reise.’ 
In most specimens the lobe or tooth, which occurs immediately 
behind the notch on the upper and under margins of the larger 
hand, is rounded or subacute, but rarely very acute, as is proved 
by a specimen from the Meregui Seas. 
I can also record the existence of a variety of the smaller 
hand of the male, described by Miers, characterized by the 
upper margin of the palm being more or less distinctly notched, 
whereas it is smooth and entire in the type; the lower margin, 
