256 ON AUSTRALIAN AMFIIIPODA. 



antenueo subequal with superior pair ; peduncle stout ; flagellum 

 rather longer than the peduncle. Anterior gnathopoda stout, 

 pediform. Posterior gnathopoda much more slender than the 

 anterior pair ; propodos nearly twice as long as broad ; palm 

 transverse, excavated ; dactylos short. Pereiopoda subequal, 

 short and rather stout. Pami of posterior pleopoda lanceolate, 

 both bordered with hairs on one margin. Telson simple. Colour 

 pearly white. 



Length three lines. 



Sab. Port Jackson. Common among sea-weed, etc., in the 

 sub-littoral zone. 



Lysianassa amnis, sp. nov. 



Nearly allied to the preceding ; distinguished from it by the 

 length of the inferior antenna) which are longer than the body. 



Hah. Port Jackson. 



Genus Glycera, (novum). 



Superior antenna) slender, rather long, provided with an 

 appendage. Mandibles with a palp, the incisive edge not toothed ; 

 no accessory plate ; anterior margin with a prominent tubercle. 

 Maxillipedes with large squamiform processes on the basal joints. 

 Four anterior pairs of coxa) deeper than their respective segments; 

 the fourth pair slightly produced inferiorly and posteriorly. 

 Gnathopoda filiform, slender ; anterior pair smaller than the 

 posterior, imperfectly subchelate ; posterior pair subchelate. 

 Posterior pleopoda biramous ; the rami broad-lanceolate. Telson 

 double. 



The length of the superior antenna) would almost seem to 

 exclude this remarkable form from the Lysianassides ; the rest Of 

 the structure however, appears to shew that its nearest affinities 

 are with the present group. 



Glycera tenuicornis, up. imic. (PI. VIII. , fig. 6.) 

 Eyes long-oval, nearly meeting above. Superior antenna) as 

 long as the cephalon and first three segments of the pereion, first 



