284 GAMMARIDJE. 



A MP RIP ODA . OA MM A RIDES. 



NATAT0R1A. 



Genus STIMPSONIA. 



Stimpsonia. Spence Bate, Cat. Amph. Brit. Mus. p. 162. 



Generic character. Superior antennae shorter than the in- 

 ferior, furnished with a secondary appendage. First pair of 

 gnathopoda robust, with the carpus large, and armed with a 

 strong bent spine. Second pair of gnathopoda chelate. 



This genus probably bears too close a resemblance 

 to Microdeutopus to be retained as generically distinct ; 

 but the superior antennae, instead of being longer than 

 the inferior, are very much shorter. The first pair of 

 legs are longer than the second, and are complexly 

 chelate ; the second pair are small and chelate, and the 

 wrist is greatly elongated. The posterior pair of legs are 

 longer than the preceding. The posterior pair of caudal 

 appendages are double-branched, and the central tail- 

 piece is conical. 



The name given to this genus is in compliment to the 

 distinguished naturalist of the United States' Exploring 

 Expedition to the North Pacific, and to whom we wish 

 here to record the obligation that we are under, both for 

 information and specimens of various species described 

 by him. 



