( 109 ) 



In the male, besides the uropods, there are three appendages (somites 

 3-5) on the left side. In the female, in addition to four (very unequally- 

 biramous) appendages on the left side (somites 2-5), there is a pair of 

 appendages, modified for sexual purposes, on the first abdominal somite. 

 The uropods are more developed on the left side than on the right. 



The gills, which are phyliobranchi^e, are 11 in number on either side, 

 arranged as in Farapagurjis, Syiiipaourns, and Eiipagurus. 



The affinities of this genus seem to be with Eupagjirus, the principal 

 point of difference being the presence in the female of Nematopagurus of a 

 pair of appendages, modified for sexual purposes, on the ist abdominal 

 segment, as in Pyiopagurus, Pylopaguropsis and Mimidopagurus. 



So far as is known at present the species of Nematopagurus are confined 

 to the sublittoral depths of the Eastern Atlantic (between the coast of Spain 

 and Cape Verde), of the Western Mediterranean, of the Arabian and 

 Andaman Seas, and of the coast of Ceylon. 



Key to the Indian species of the genus Nematopagurus. 



1. Outer surface of the hand with a single median longitudinal 

 row of spines ; — 



1. Eyestalks shorter than the anterior border of the 



carapace — _ ••• ••. N. indicus. 



2. Eyestalks as long as the anterior border of the 



carapace ...___ N. gardineyi, 



II. Outer surface of the hand studded with numerous spines in 



addition to a conspicuous median longitudinal row _ N. muricatus. 



111. Outer surface of the hand (and wrist) covered with flat 

 imbricating squamiform or scutiform tubercles : — . 



1. Squames of the hand in several longitudinal serieo _ N. squamichelh. 



2. Squames of the hand in two longitudinal series ... TV. saitellicheiii. 



I. Nematopagurus indicus, n. sp. Plate XII., tig. 4. 



This species hardly differs from N. longicorms, Edw. and Bouv., from the Western Medi- 

 terranean and adjacent Atlantic region. Except in the facts that the chelipeds are shorter 

 and the antennal flagella less setose, the Indian species entirely conforms to the description 

 and figures of the French authors. 



Carapace with some regularly disposed tufts of hairs on the hepatic 

 and gastric regions. Rostrum very broadly triangular, not so prominent 

 as the antennal angles of the carapace, and leaving the ophthalmic segment 

 exposed. 



Eyestalks stout, much dilated anteriorly, not so long as the anterior 

 border of^the carapace, at least as long as the peduncles of the antennae, 

 and reaching beyond the middle of the terminal joint of those of the 



