AUStfiAMAST MALACOSTBACA. 237 



oblique, defined by a strong tooth. Posterior pair with the 

 propodos similar to that of the anterior, but rather broader, 

 with the palm slightly less inclined to the long axis of the 

 propodos, and the defining tooth larger. Two anterior pairs of 

 pereiopoda subequal, hairy, their meros and carpus broad. Three 

 posterior pairs serrated and hairy , fourth pair much longer than 

 the others, longer than the pereion ; basa of third and fourth 

 pairs armed much longer than broad ; fifth pair very small, the 

 basos dilated posteriorly, broader than long, its posterior margin 

 armed with fine serrations. Rami of sixth pleopoda broad- 

 lanceolate ; outer longer and broader than inner, serrated ; inner 

 smooth ; both armed with setae. Telson with the halves broad, 

 compressed, truncate, bordered with a few hairs. Length 7 lines. 



Port Jackson. 



425. Phoxus Batei. 



Phoacus Batei, Haswell, 1. c, p. 259, pi. ix., fig. 3. 



Rostrum as long as the rest of the cephalon, straight, obtuse. 

 Eyes distinct, long-oval. Superior antennas with the peduncle 

 extending beyond the extremity of the rostrum ; first joint of 

 the peduncle nearly as broad as long ; second as long as the first, 

 but of only about half the breadth ; third joint about one-fourth 

 of the length of the first ; flagellum longer than the last two 

 segments of the peduncle ; appendage two-thirds of the length 

 of the flagellum, consisting of about six articuli. Inferior 

 antennas rather longer than the superior ; the penultimate joint 

 of the peduncle broad, its superior border straight and smooth, 

 its inferior border convex, serrate and hairy ; last joint shorter 

 and narrower than the penultimate, serrate, armed with hairs 

 and with two slender spines ; flagellum as long as the two last 

 segments of the peduncle. Coxae bordered with a few hairs. 

 G-nathopoda similar, subequal ; propodos twice as long as broad ; 

 palm very oblique, defined by an acute tooth. Two anterior 

 pairs of pereiopoda subequal, stout. Fourth pair of pereiopoda 

 longer than the third ; fifth pair shorter, with the basos very 

 broad, but scarcely so broad as long, serrate on its posterior 

 border. Fourth and fifth pairs of pleopoda armed with short 

 acute spines. Sixth pair with the rami unequal ; the outer 

 broad-lanceolate, truncate, serrate, bordered with hairs ; the inner 



