112 DE. J. G. DE MAN ON THE PODOPHTHALMOTJS 



wholly smootli and devoid of granulations. Sometimes, as m 

 the specimen which I have figured (fig. 4), the index is a little 

 shorter than the thumb, but this may be abnormal. 



At a somewhat earlier age the fingers are comparatiToly less 

 elongate ; a very accurate figure of the hand of such a specimen 

 has been published by Hilgendorf {I. c. fig. 1 c). In still younger 

 individuals, in which the distance between tbe external orbital 

 angles measures 20 millim., and in which the hand is only 21 

 millim. long, the palm presents nearly the same length as the 

 fingers (fig. 7). In specimens in which the distance between 

 the external orbital angles measures only 10 millim., and the 

 larger hand of which is 7-8 millim. long, the fingers are even 

 a little shorter than the palm. 



For the form of the ambulatory legs, which are tolerably slender 

 in this species, I refer the reader to my figure and to that given 

 by Mr, Hilgendorf, The following details, however, may be 

 mentioned. The upper margin of the meropodites of the adult 

 male is minutely granular along the distal, and hairy along the 

 proximal half; along the upper and under margins of the mero- 

 podites of the three anterior ambulatory legs of the female this 

 granulation is much more developed, the acute granules of the 

 upper margins being arranged in two rows close to one another. 

 In the female a tuft o£ close short hairs occurs along the under 

 (posterior) margin of the meropodites of the last pair of legs; 

 but it is absent in the male. 



The cephalothorax of some of these specimens, preserved in 

 spirit, is dark bluish, whilst in others it is dark green ; the larger 

 band is yellowish or reddish brown. 



Dimensions of an adult male specimen : — 



millim. 



Distance between the external orbital angles. . 33 



Length of the carapace (front included) .... 19 

 Length of the posterior margin between the 



insertion of the last pair of legs 13 



Length of the larger hand 60 



Middle length of the palm 20 



Length of the fingers 40 



Among the other species of Gelasimus which inhabit the 

 Indo-Pacific Ocean, this species appears to be most closely 

 allied to G. arcuatus, de Haan, which, however, may be distin- 



