AUSTRALIAN MALACOSTBACA. 251 



superior pair. Mandibles with a palp. Maxilliped.es unguiculate 

 sub-pediform, provided with a squamiform plate on the basos 

 only. Gnathopoda subchelate, unequal, posterior pair very large. 

 Pereiopoda stout. Posterior pleopoda biramous, the rami short 

 conical. Telson single, elongate. 



This genus, of which I have as yet observed but one species, 

 has affinities with Murystlieus and Amathia, but is distinguished 

 from the former by the form of the telson and the stoutness of 

 the pereiopoda, and from the latter mainly by the large size of 

 the posterior gnathopoda. 



443. Harmonia crassipes. A.M. 



Harmonia crassipes, Haswell, 1. c, p. 330, pi. xix., fig. 3. 



Superior antennae as long as the cephalon and first six segments 

 of the pereion, first and second segments of the peduncle subequal, 

 the second narrower than the first, third scarcely. distinguishable 

 from the articuli of the flagellum, flagellum rather longer than 

 the peduncle. Inferior antennae longer than the superior pair ; 

 peduncle and flagellum subequal. Anterior gnathopoda small ; 

 propodos ovoid ; palm oblique, undefined. Posterior gnathopoda 

 much larger than the anterior pair ; carpus sub-triangular ; pro- 

 podos irregularly ovoid, palm oblique, excavate, defined by a 

 triangular tooth, and armed with another of similar form near 

 the distal end. Two anterior pairs of pereiopoda subequal ; 

 three posterior pairs with the basa oblong, twice as long as 

 broad, the other joints very broad, the dactylos very stout ; 

 fourth pair smaller than the fifth and sixth. Rami of the fourth 

 pair of pleopoda as long as the protopodite ; those of the fifth 

 pair shorter ; those of the sixth pair very short, conical, armed 

 with a few straight setae. Telson simple, conical, compressed. 

 Colour brown. Length -ia in. 



Port Jackson. 



G-enus Melita, Leach. 



Eyes round. Superior antennae appendiculate. Inferior 

 antennae shorter than the superior. Coxae not deeper than 

 their respective segments, those of the third pair of pereiopoda 

 shorter than those of the fourth. First pair of gnathopoda 

 small ; second pair of gnathopoda very large. Pereiopoda 



