260 ON AUSTRALIAN AMPlIirODA. 



tlie length of the first ; fhgellum longer than the last two segments 

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

 nagellum, consisting of about, six articuli. Inferior antenme 

 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 ; nagellum as long as the two last segments 

 of the peduncle. Coxse bordered with a few hairs. Gnathopoda 

 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 bason 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 about half as long as the 

 outer, narrower, armed with long hairs. Halves of the telson 

 slender. 



Length four and a half lines. 



Uab. Port Jackson, (dredged.) 



This species is at once distinguishable from the preceding hy 

 the larger size of the eyes and the form of the fifth pereiopods. I 

 have named it after Mr. Spence Bate, F.K.S., to whom every 

 student of the Amphipocla is so much indebted. 



Sub-fam. GAMMABIDES. 



Genus Pherusa, Leach. 



Pherusa kevis, sjj. nov. (PL IX., fig. 4.) 



Eyes round. Superior antennse equal in length to the cephalon 

 and first six segments of the pereion ; first two segments of the 

 peduncle subequal ; third scarcely half the length of the second ; 

 nagellum much longer than the peduncle. Inferior antennce longer 



