2 32 ON AUSTRALIAN AMniirODA. 



twice as long as broad ; palm nearly longitudinal, defined by a 

 sharp tooth. Third pair of pereiopoda much shorter than the 

 fourth and fifth. 



Length about five lines. 



Hal. Kiama, New South Wales, under large stones between 

 tide marks. 



Allorchestes crassicornis, sp. nov. (PL VII., fig. 5.) 



Inferior antennae as long as the cephalon and first three segments 

 of the pereion ; peduncle stout ; third segment much longer than 

 the others ; flagellum very stout, rather longer than the peduncle. 

 Superior antennae exceeding in length the first and second 

 segments of the peduncle of the inferior pair ; the segments of 

 the peduncle all of nearly equal length, the third slightly shorter 

 than the other two ; flagellum half as long again as the peduncle. 

 Anterior gnathopoda with the carpus sub -triangular, having a 

 short hair-bordered process on its ventral aspect ; the propodos 

 oblong, twice as long as broad ; palm transverse, not defined. 

 Posterior gnathopoda with the propodos two-and-a-half times as 

 long as that of the anterior pair ; palm oblique, defined, armed 

 with a row of short spines. Third pair of pereiopoda shorter 

 than the others ; fourth and fifth pairs subequal. 



Length about five lines. 



Hal. Kiama, New South Wales, between tide-marks. 



This species is well characterised by the unusual stoutness of 

 the inferior antenna}. 



Fam. GAMMAKIDiE. 



Sub-fam. STEGOCEPHALIDES, 



Genus Stegocephalus, Kroyer. 



Stegocephalus latus, sp. nov. (PL YIIL, fig. 2.) 



Cephalon short, about half as long as first segment of pereion. 

 Pereion dilated. Pleon slightly compressed. Superior antennae 



