142 CRUSTACEANS OF THE 



extremity measures '/jg of its length. The fingers are a 

 little longer than the palm, still glabrous and the basal 

 teeth are scarcely visible. 



The larger ova-bearing female has about the same length 

 as the adult male and is still provided with the right leg of 

 the second pair. This leg measures about two thirds the 

 whole length and is thus shorter and less stout than the legs 

 of the adult male. The merus reaches the distal end of the 

 antennular peduncle, as far as in the male of 47 mm. The 

 carpus, once and a half as long as the merus, is still 

 slightly more slender than in the male, its diameter at 

 the distal extremity measuring only '/jj of its length, 

 though the form is quite the same. The hand is di- 

 stinctly shorter than the carpus, measuring 

 four fifth of the latter, and the fingers are 

 somewhat shorter than the palm, in the same 

 proportion as in the adult male. Examined with a 

 lens, the fingers present the same minute basal teeth (Fig, li) 

 and the same cutting-edge as in the male, but they are 

 not covered with hairs. The minute points and spinules on 

 the surface of the joints are scarcely visible and the leg 

 appears smooth for the naked eye. 



The other ova-bearing female, that has also lost one of 

 the legs of the second pair, agrees fully with the other. 

 In a still younger female, 38 mm. long, the carpus appears 

 also distinctly longer than the hand. 



We may conclude from the preceding description 1° that 

 the carpus of very young male individuals is 

 a little longer than the hand, that both joints 

 have the same length in middle-sized male 

 specimens, but that the chela of the adult 

 male is slightly longer than the carpus, 2° 

 that the carpus of the female is constantly 

 slightly longer than the hand, and finally that 

 in adult specimens the carpus is once and a 

 half as long as the merus, in younger indivi- 

 duals once and a third. 



Notes from the Leyden Museum, Vol. XX. 



