I. '08. 



77 



All the pereiopods are very slender, the last three pairs being 

 of enormous length. The first four pairs bear slender exopods 

 which decrease in size from before backwards. 



The first pair reaches beyond the tip of the antennal scale by 

 the length of the chelae and sometimes by one quarter of the 

 carpus as well. The carpus is quite three times the length 

 of the chela and is longer than the basus and ischium com- 

 bined. The ischium is not quite as long as the merus and like 

 it may bear a few short spines ventrally. 



The second pair reaches beyond the tip of the antennal scale 

 by the whole length of the carpus and chela. The chela is a 

 trifle longer than that of the first pair ; the carpus which is 

 five times its length is' about one and a half times as long 

 as the merus. As in all the succeeding pairs a few spines are 

 usually present on the merus and occasionally on the ischium 

 also. 



The third, fourth, and fifth pairs are very long, surpassing 

 the tip of the antennal scale by the whole of the dactylus, pro- 

 podus and carpus and a considerable portion of the merus also. 

 The carpus, propodus, and dactylus together are rather shorter 

 than the merus and ischium combined. In the third and 

 fourth pairs the dactylus is spiniform and slightly longer than 

 the propodus ; in the last pair it is short, only about one quar- 

 ter the length of the preceding joint ; in all three pairs it is 

 partially concealed by a fringe of very long setae from the 

 distal end of the propodus. 



The branchial formula is the same as in all the other species 

 of the genus : — 





ViL 



vin. 



IX. 



X. 



XL 



XTT. 



XTTL 



XIV. 



Podobranchiae, 



ep. 



l+ep. 



ep. 



ep. 



ep. 



ep. 



ep. 





Arfchrobranchiae, 





... 



2 



1 



1 



1 



1 





Pleurobrauchiae, 



... 



... 





1 



1 



1 



1 



1 



The endopod of the first pleopod is in the female (fig. 4) 

 about tw^o-thirds the length of the exopod and strongly setose 

 along both margins. In the male (fig. 5) the endopod is a 

 rather broad lamella less than half the length of the exopod ; 

 it is apically emarginate and is provided with a prominence 

 bearing small hooks or cincinnuli in the middle of its inner 

 margin. In the last four pairs of pleopods the endopod is 

 only slightly shorter than the exopod and bears a stylet or 

 appendix interna at its base. In the male an additional stylet, 

 the appendix masculina, is present on the second pair (fig. 6). 



The outer uropods are longer than the inner and rather less 

 than four times as long as wide. 



