BY WILLIAM A. HASWELL, M.A., B.SC. 267 



of the peduncle of the superior pair ; flagellum shorter than the 

 peduncle. Anterior gnathopoda small ; carpus and propodos 

 sub- equal, hairy ; propodos irregularly ovate ; palm straight, 

 oblique, undefined. Posterior gnathopoda large ; meros armed 

 behind with a short spine ; carpus short, closely applied to the 

 propodos ; propodos four times as long as that of the anterior 

 pair ; broad proximally, becoming narrower towards the distal 

 end ; daetylos curved, bent on the inner side of the propodos when 

 closed. First and second pereiopoda sub-equal. Three posterior 

 pairs very broad ; meros expanded posteriorly, and, together with 

 the carpus and propodos, serrated and armed with setae ; third 

 pair shorter than the fourth and fifth ; basos of fifth pair much 

 broader than that of the others. Rami of the posterior pleopoda 

 sub-equal, twice as long as the protopodite, foliaceous, armed 

 with setae along the margins. Telson with the halves laterally 

 compressed, each terminating in two acute spines, and armed 

 with a few short setae. 



Length nine lines. 



Hah. Tasmania ( If. -31. J 



Genus Mcera, Leach. 



Moera rubro-maculata, (PL X., fig. 4.) 



Gammarus rubro-maculatus, Stinvpson, JProc. Acad. Nat. Sci., 

 Philad., July 1855. 



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 flagellum ; first two segments 

 rather long, third short ; appendage of seven segments. Inferior 

 antennae a little more than half the length of the superior pair ; 

 flagellum 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 



