2.2 ON AUSTRALIAN AMPIIIPOPA. 



Genus Xenociieika, (novum). 



Char. gen. Body slender Coxce small. Superior antenna) very 

 long, longer than the inferior pair, with a secondary appendage. 

 Mandibles with an appendage. Both pairs of gnathopoda non- 

 subchelate, armed with very long hairs ; carpus of posterior pair 

 broad, plate-like, applied to the anterior (dorsal) border of the 

 meros. Posterior pleopoda biramous. Telson simple. 



Xenocheira fasciata, sp. unic. (PL XL, fig. 6.) 



Ej^es round. Superior antennae as long as the cephalon and 

 pereion; first joint of the peduncle stout, rather longer than the 

 cephalon ; second rather longer and narrower than the first ; 

 third not one-half of the length of the second ; flagellum longer 

 than the peduncle, slender ; appendage short, of five segments. 

 Inferior antennae with the peduncle longer than that of the 

 superior pair ; fourth segment the longest ; flagellum shorter 

 than the last segment of the peduncle, of nine articuli, each armed 

 with one or two curved spines and a few hairs. Maxillipedes 

 non-unguiculate ; the borders of the ischial scale and of the palp 

 armed with a close fringe of long hairs. Anterior gnathopoda 

 sub-pediform, stout ; carpus triangular, short ; propodos nearly 

 twice as long as the carpus, narrow, its superior border slightly 

 convex, its inferior straight ; dactylos terminal, large, its inner 

 border armed with a series of sharp denticles. Posterior gnathopoda 

 with the ischium sub -triangular, articulating with both meros 

 and carpus ; the latter broad, squamiform, with a close fringe of 

 long hairs ; the former narrow ; propodos narrow, subequal with 

 that of the anterior gnathopoda ; dactylos very short. Pereiopoda? 

 Fourth and fifth pairs of pleopoda armed with a few acute spines. 

 Posterior pleopoda with the rami narrow, bordered with a few 

 setiferous serrations and armed terminally with a small number 

 of slender hairs. Telson scale-like, very short. 



Length three and a half lines. 



Hal. Port Jackson. 



