332 ON SOME NEW GENERA AND SPECIES OF AMPHIPODA. 



lanceolate, serrated. Telson as long as the protopodite of the 

 posterior pleopoda, deeply cleft ; the halves compressed, ending 

 each in two acute spines, of which the outer is much more 

 prominent than the inner. Length about \ in, 



JIab. Tasmania. (Macleay Museum.) 



This species probably approximates near enough to>E. cuspidatus 

 and E. Helvetia to be placed in the same genus ; although the 

 form of the maxillipedes appears to be rather different. 



Genus MraitA, Leach. 

 Mcera dentif era, sjp. nov. (PI. XX., fig. 4.) 



Superior antennae equal in length to the cephalon and first four 

 segments of the pereion ; third segment of the peduncle two-thirds 

 of the length of the second ; flagellum as long as the last two 

 segments of the peduncle, of about ten articuli, each ornamented, 

 like the peduncle, with several longish hairs; appendage well- 

 developed, of five articuli. Inferior antennoe slightly longer than 

 the superior ; fourth and fifth segments of the peduncle sub-equal; 

 flagellum half as long again as the last segment of the peduncle 

 of about twelve articuli ; both peduncle and flagellum armed with 

 slender hairs, which are longer on the former. Anterior 

 gnathopoda small ; propodos ovate, palm not defined. Posterior 

 gnathopoda very large ; meros with a pointed process at its inf ero- 

 distal angle ; carpus short, sub -triangular ; propodos about six 

 times the length of the carpus, broad at the base, narrowing 

 distally ; palm two-thirds of the length of the propodos, concave, 

 with a low protuberance at its distal end, armed with fasciculi of 

 long hairs, and defined by a long spine-like tooth ; dactylos nearly 

 as long as the propodos. Rami of posterior pleopoda scarcely 

 larger than the others, lanceolate, armed with a few bristles. 

 Telson small, the segments conical. Colour light olive with 

 minute black dots. Length l/5th in. 



Hal. Clark Island, Port Jackson ; among sea- weed. 



