254 ATTSTBALIAK MALACOSTBACA. 



446. Mcera rubro-maculata. A.M. 

 Gammarus rubro-maculatus, Stimpson, Proc. Acad. Nat. Sci., 



Philad., July 1855 ; Spence Bate, Cat. Amphip. p. 220. 

 Mcera rubro-maculata, Haswell, 1. c, p. 267, pi. x., fig. 4. 



Posterior borders of the pleonal segments with comb-like rows 

 of acute teeth. Coxae shallower than their respective segments, 

 fifth pair deeper than fourth. Superior antennae half as long as 

 the body, the peduncle rather shorter than the ilagellum ; first 

 two segments rather long, third short ; appendage of seven 

 segments. Inferior antennae a little more than half the length 

 of the superior pair ; ilagellum less than half the length of the 

 peduncle. Anterior gnathopoda rather large, hirsute below; 

 carpus broad, triangular ; propodos irregularly ovate, as long as 

 the cephalon. Posterior gnathopoda much larger than the 

 anterior pair ; meros with a sharp spine behind ; carpus hairy ; 

 propodos as long as the cephalon and first two segments of the 

 pereion, ovate, its palm strongly convex, defined by a small tooth, 

 its dorsal bprder nearly straight. Two anterior pairs of pereio- 

 poda subequal, their coxae little more than half the depth of their 

 respective segments ; meros produced anteriorly at its distal end. 

 Three posterior pairs of pereiopoda hairy, the third pair the 

 shortest, the fourth the longest ; basos narrow, its posterior 

 border serrated and armed with a sharp tooth at the distal end. 

 Lateral plates (epimera) of the three anterior segments of the 

 pleon serrated posteriorly. Fourth pair of pleopoda longer than 

 fifth, both provided with setae on the protopodite and rami. Last 

 pair of pleopoda very large, biramous, the rami foliaceous, long- 

 ovate, emarginate ; their margins serrate, the serrations and the 

 extremity armed with setae. Telson of two short, cylindrical 

 rami, each with one or two setae. Colour light pink, striped and 

 spotted with crimson. 



Port Denison ; Port Stephens ; Port Jackson. 



447. Mcera hamlgera. 



Mcera hamigera, Haswell, 1. c, p. 333, pi. xxi, fig. 1. 



Superior antennae as long as the cephalon and pereion ; second 

 segment of the peduncle longer and narrower than the first ; 

 third half the length of the second ; ilagellum nearly as long as 

 the peduncle ; appendage of four articuli. Inferior antennae as 



