348 ON SOME NEW GENERA AND SPECIES OF AMPHIPODA, 



longitudinal, undefined. Posterior gnatliopoda very large ; basos 

 longer than the cephalon; carpus small, sub-triangular ; propodos 

 nearly as long as the basos, narrow, palm nearly longitudinal, 

 defined by a broad, low, triangular process, and armed near the 

 distal end with a sharp tooth. Pereiopoda short and broad, with 

 a well-defined, bristle-armed palm. Colour grey. Length ^ in. 



Hab. Clark Island, Port Jackson. 



Caprella inermis, sp. nov. (PI. XXIII. , fig. 3.) 



Cephalon terminating anteriorly in a minute mesial tooth. 

 Neck very long ; first segment of the body longer than the head 

 and neck, the rest shorter. Superior antenna) as long as the 

 cephalon and first segment of the pereion ; nagellum shorter than 

 the last two segments of the peduncle. Inferior antenna) a little 

 longer than the peduncle of the superior pair ; nagellum shorter 

 than the two last segments of the peduncle. Anterior gnatliopoda 

 short ; propodos ovate, palm longitudinal, undefined. Posterior 

 gnathopoda very large ; propodos elongated, narrow ; palm 

 excavate, uniformly concave, occupying about one-third of the 

 entire length of the propodos, Branchia) sub -cylindrical. Last 

 pair of pereiopoda longer than the others. Colour green. Length 

 7/10ths inch. 



Hah. Port Jackson. 



Caprella obesa, sp. nov. (PL XXIV., fig. 1.) 



Male. — Body stout, unarmed ; first two segments subequal, the 

 rest much shorter. Eyes small, round. Superior antenna) rather 

 exceeding in length the cephalon and two suceeding segments ; 

 peduncle very stout, flagellum equal in length to the last segment 

 of the peduncle. Inferior antenna) a little longer than the first 

 two segments of the peduncle of the superior pair, fringed below 

 with long hairs. Anterior gnathopoda small, palm longitudinal, 

 undefined. Posterior gnathopoda very large, basos broad, its 

 anterior border minutely toothed; propodos as long as the cephalon; 



