Rev. T. R. R. Stebbing's Revision of Amphipodi. 203 



expanded second joint of the palp. First and second gnatlio- 

 pods with fifth joint subequal to sixth, the palm nearly trans- 

 verse. First to fourth perteopods with membranous cap over 

 tip of the narrowly boat-shaped finger. Third uropods with 

 rami subequal to the peduncle. Telson rather longer than 

 broad. 



The generic name is in recollection of the late Charles 

 Spence Bate. 



The type species is Halimedon Schneideri, Stebbing. 



Fam. PleustidaB. 

 Mesopleustes, gen. nov. 



Body carinate, integument indurated. Rostrum large. 

 First to fourth side-plates distally narrowed. Upper lip with 

 small oblique incision. Mandibles with molar prominent, 

 strong, ovaL First maxillae with four setse on the inner 

 plate. Maxillipeds with outer plates scarcely reaching beyond 

 the first joint of the palp, the finger strong. The gnathopods 

 subchelate, strong, second pair the larger. Pereeopods robust, 

 subequal. Telson subrotund. 



The type species is Pleustes ahijssorain, Stebbing. 



Sympleustes, gen. nov. 



Rostrum small. Upper lip with oblique incision. Man- 

 dibles with molar strong, oval. First maxillaj with two set.a 

 on the inner plate. Maxillipeds with finger slight. Second 

 gnathopods usually much stronger than the first and more 

 distinctly subchelate. 



To this genus I refer Amphithoe latipes, M. Sars, Amphi- 

 thopsis glaber, Boeck, Amphithopsis pidchella, G. 0. Sars, 

 Amphithopsis Olrikii, Hansen, and Amphithopsis grandi- 

 ma7ia, Chevreux. 



Fam. CalliopiidaB. 

 Pakaleptamphopus, gen. nov. 



Body without dorsal dentation. First antenna) the longer, 

 with small accessory fiagellum. Lower lip without inner 

 lobes. Mandibles with third joint of palp sho: ter tlian the 

 second. First inaxillai with many seta3 on the inner phite ; 

 second maxillee with setae fringing the inner margin of the 

 inner plate. Maxillipeds with outer plates not reaching the 

 apex of the palp's second joint. Gnathopods subchelate. 



