164 GAMMARIIXE. 



straight finger. The last pair of caudal appendages are 

 double-branched, and the terminal plate is squamiform. 



The genus was first described by Mr. Stimpson, in his 

 " Synopsis of the Marine Invertebrata of Grand Ma- 

 nan," it which he says that it differs from (Ediceros in the 

 form of the hands. We have not, until recently, had an 

 opportunity of seeing an undoubted specimen of the 

 latter genus. This, however, corroborates our previously- 

 expressed opinion, which was based upon the circum- 

 stance that Kroyer, in his description of the genus, did 

 not in any way refer to the prolonged carpus of the first 

 two pairs of legs : we, therefore, agree with Stimpson, 

 and retain the genus Monoculodes, to which CEdiceros 

 appears to be closely allied. Monoculodes assimilates also 

 to JVestwoodilla, in which, however, the second pair of 

 legs are not in the least degree subchelate. 



This genus was first described in this country by Mr. 

 Spence Bate, in " A Synopsis of the British Amphi- 

 poda," under the name of Kroyera, with Westwoodea 

 carinata (Brit. Assoc. Rep. 1855, p. 58) as its type. 

 Being, however, identical with Monoculodes of Stimpson, 

 the name of Kroyer a has been sunk for the present 

 genus. In order, however, that the name of the dis- 

 tinguished Danish carcinologist should remain associated 

 with the present class, it has been transferred to a sub- 

 sequent genus. 



