Crustacea of the Channel Islands. 365 



Ampldlochns neapolitamis, Delia Vallo, = A. mclanops^ Walker. 



-bordeaux Harbour, Guernsey; and Jersey. 

 Fdtocoxa Marioni, Catta, = Cyproidea damnoniensis, Stcbbing. 



Jersey. 

 Stenothoe monoculoides, Montagu. Guernsey and Jersey. 



marina. Bate. Jersey {Koehler). 



Aletojja rtihroviltataj G. 0, Sars. Bordeaux Harbour, Guernsey. 

 horealis, G. 0. Sars. Off St. Martin's Point, 25 fath. (TF.). 



Metopa sarniensis, sp. n. (PI. XVII. figs. 1-5.) 



A very small species. Tlie antennules and anteiinge are 

 subequal in length, and the peduncles of both are quite 

 smooth and devoid of setae. The first joint of peduncle of 

 the antennules is stout and equals in length the two following 

 joints ; the flagellum is 8-jointed, the first of these joints 

 equals in Icngtli the last two joints of the peduncle. The 

 first gnathopod (fig. 1) is remarkable on account of the very 

 short carpus, which is somewhat triangular ; the propodos 

 equals nearly three times tiie length of the carpus, it gradually 

 tapers for the attachment of the gently curved finger ; tiie 

 propodos has one seta on the side near the end and a bundle 

 of three below the attachment of the finger; the finger (fig. 2) 

 has its distal portion minutely denticulated or serrated ; two 

 minute setae are on its side above the serrations, and there 

 are no others. 



The second gnathopod (fig. 3) is subchelate and resembles 

 that of many members of the genus in its general form. Tiie 

 hand widens gradually and slightly from its base, and distally 

 is abruptly truncated, so that the palm is transverse (fig. -i) ; 

 the nail is strong and about equals tiie transverse palm in 

 lengtii; it iias on its back four setae, and on tiie paiin wiiere 

 tlie tip of the finger meets it tiiere is a group of slender spines 

 and a few seta3. 



Tlie last pereeopods (fig. 5) have the basos outspread behind 

 into a thin lamina, which is devoid of setaj or spines ; the 

 meros is expanded behind and projects down to near the 

 extremity of the carpus. 



The first gnathopods are, perhaps, more valuable in this 

 genus for specific ciiaracters than the second, though tlie 

 latter are so mucii the larger. In this species the first 

 gnatliopod is quite difi'erent from tiiat of any other species 

 of tlie genus known to me ; botli tiie very sliort carpus and 

 tlie serrated tip of tiie finger are quite exceptional. 



A single specimen was dredged, July lOOG, not far from 

 the harbour of iSt. Peter's Port, Guernsey. 



