CRUSTACEA OF THE MERGUI ARCHIPELAGO. 267 



Mr. Miers has not only given a new description of tMs species 

 in bis 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. 



Hed-Sea specimens. 



6i 21 IJ I 61 21 11 



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. ^'''^ -i^^^*' ^^''^"'^ J^^"^*" 

 14 41 4^ 



7 2f 21 



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 Mergui 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 notclied, 

 whereas it is smooth and entire in the type ; the lower margin, 



