320 ON SOME NEW GENERA AND SPECIES OE AMPOTPODA, 



short, about half the length of the cephalon ; second and third 

 shorter ; flagellum of nine articuli. Inferior antennae twice as 

 long as the superior pair ; flagellum much longer than peduncle, 

 the articuli nearly twice as broad as long at the proximal end, 

 becoming narrower and longer towards the extremity ; seta3 few 

 and short. Anterior gnathopoda with a lamellar, hair-bordered 

 process on the carpus ; propodos ovoid, twice as long as broad, 

 palm short, oblique, with a defining spine. Posterior gnathopoda 

 with the carpus small, triangular ; the propodos irregularly heart- 

 shaped with the palm oblique, defined by a triangular tooth, and 

 armed with a row of spines ; the dactylos with a small tooth at 

 its base on the inner side. Pereiopoda subequal, with a few 

 setae on the borders of the segments. Colour blackish purple or 

 brown. Length one-fifth in. 



Hab. Among sea-weed on Clark Island, Port Jackson; common. 



Fam. GAMMABIDzE. 

 Genus Cyproidia (novum). 

 Body broad. Pereion and pleon of equal length. Coxa) of 

 gnathopoda very small. Coxa3 of the first and second pairs of 

 pereiopoda enormously developed ; and cemented bogetherto form 

 broad and deep lateral shields, concealing almost entirely the 

 gnathopoda and pereipoda, and extending forwards to the sides 

 of the cephalon, and backwards as far as the posterior border of 

 the sixth segment of the pereion, excavated posteriorly for the 

 amalgamated shallow coxae of the third and fourth pereiopoda. 

 Coxa? of the last pair of pereiopoda very small. Antenna? subequal, 

 superior without an appendage. Mandibles with a palp. 

 Maxillipedes unguiculate ; both basos and ischium armed with 

 small squamiform plates. Gnathopoda subcheliform. Pereiopoda 

 slender. Posterior pleopoda biramous. Telson single. 



Cyproidia ornata, sp. nor. (PL XYIII. fig. 1.) 



Cephalon with a slight rostral prolongation. Eyes round. 

 Superior antennae nearly as long as the cephalon and the first two 



