232 AUSTBAHAIT MALACOaTBAGA. 



and posteriorly. Cofise of the fourth pair much shorter than the 

 third, Pereiopoda subequal. Posterior pair of pleopoda double- 

 branched. Telson single, squamif orm, entire. 



418. Lysianassa nitens. Plate ir., fig. l. 



Lysianassa nitens, Haswell, 1. c., p. 255, pi. viii., fig. 5. 



Eyes rather small. Superior antennae short, equalling in 

 length the cephalon and the first segment of the pereion ; 

 flagellum about half as long as the peduncle, of ten articuli ; 

 appendage of six articuli. Inferior antennae subequal with 

 superior pair ; peduncle stout, sub- cylindrical, not compressed ; 

 flagellum rather longer than the peduncle. Anterior gnatho- 

 poda stout, pedif orm. Posterior gnathopoda much more slender 

 than the anterior pair ; propodos nearly twice as long as broad ; 

 palm transverse, excavated ; dactylos short. Pereiopoda sub- 

 equal, short and rather stout. Rami of posterior pleopoda 

 lanceolate, both bordered with hairs on one margin. Telson 

 simple. Colour pearly white. Length 3 lines. 



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

 littoral zone. 



This species is allied to L. Kroyeri, but has the carpus and 

 propodos of the second gnathopoda broader. 



419. Lysianassa afflnis. Plate ir., fig. 2. 



Lysianassa affinis, Haswell, 1. c, p. 255. 



Nearly allied to the preceding ; distinguished from it by the 

 length of the inferior antennae which are longer than the body, 

 and by having the eyes very large, meeting above. 



Port Jackson. 



420. Lysianassa australiensis. 



Lysianassa australiensis, Haswell, 1. c, Vol. iv., p. 323, pi. xviii., 

 fig. 3. 



Resembles L. nitens, mihi, but has the eyes smaller, and the 

 propodos of the posterior gnathopoda narrower, with the dactylos 

 rudimentary. 



