ATTSTEAIiIAN MAIACOSTBACA. 223 



406. Allorchestes longicornis. 



Allorchestes longicornis, Haswell, 1. c, Vol. iv., p. 251, pi. vii., 

 fig. 4. 



Inferior antennae as long as the cephalon and the whole of the 

 pereion ; third segment of peduncle short ; fifth the longest . 

 flagellum more than twice as long as the peduncle. Superior 

 antenna? with the peduncle as long as the third and fourth seg- 

 ments of the peduncle of the inferior pair ; first and second joints 

 subequal ; third smaller ; flagellum twice as long as the peduncle. 

 Anterior gnathopoda with the carpus sub-triangular, having a 

 small hairy process on its ventral aspect ; the propodos equal in 

 length to the carpus, rather longer than broad, its dorsal border 

 nearly straight, its palmar border strongly convex ; palm oblique, 

 defined by a small tooth. Posterior gnathopoda with the propodos 

 twice as long as that of the anterior pair, heart-shaped, nearly 

 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 5 lines. 



Kiama, New South "Wales, under large stones between tide 

 marks. 



407. Allorchestes crassicornis. 



Allorchestes crassicornis, Haswell, 1. c, p. 252, pi. vii., fig. 5. 



Inferior antennse as long as the cephalon and first three seg- 

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

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

 peduncle. Superior antenna? 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 



