88 DE. J. G. DE MAN ON THE PODOPHTHA.LMOtrS 



Dimensions of the largest specimen : — 



millim. 

 Length of the cephalothoras (without the abdomen). 39 



Distance between the external orbital angles 36|- 



Distance between the tips of the last antero-lateral 



teeth, being the breadth of the cephalothorax . . 63 

 Distance between the tips of the external frontal 

 teeth, i. e. between the internal orbital angles = 



breadth of the front 21 



Length of the penultimate joint of the male abdomen. 5|- 



Breadth of the posterior margin of this joint 6 



Length of the larger hand (the fingers included) . . 441^ 



Length of the fingers 21 



Height of the hand at the base of the fingers 14 



A female of a species of Goniosoma from Amboina, preserved 

 in the Leyden Museum, and referred by me some years ago to 

 G. annulatmn, Eabr., agrees completely with the Mergui speci- 

 mens, except that the last antero-lateral tooth is only as long 

 as the fifth and not longer. I regard this form as a local 

 variety. 



Q. luciferum,'Fabv.= G. quadrimaculatum, A. M.-Edw., G. an- 

 nulatum, Fabr., and G.jajponicum, de Haan, are all closely allied to 

 G. merguiense. They may be distinguished from it at first sight 

 by the absence of the spine on the carpopodite of the natatory 

 legs. In G. japonicum the long crests of the hands are always 

 distinctly granular ; the penultimate joint of the male abdomen 

 is difi"erently formed ; the penultimate joint of the natatory legs 

 is unarmed ; the meropodites of the natatory legs are more 

 enlarged j and the last antero-lateral tooth is the smallest 

 of all. 



Subtribe Catometopa. 

 Grenus Euceatb, de Saan. 



Mr. Miers supposes that the genera Pseudorhomlila, M.-Edw., 

 Carcino])lax, M.-Edw., Uucrate, de Haan, and Pilumnoplax, 

 Stimps., will prove to be identical, when they come to be sub- 

 mitted to a thorough revision. In my opinion, however, the 

 genus Eucrate, de Haan, must be retained ; for this genus is 

 a very natural one, distinguished not only by its entire physio- 

 gnomy, but also by the structure of the external antennae. In 



