238 Proceedings of the Royal Society of Victoria. 



has many features in common with Melita but in that genus the 

 second pair of hands is conspicuously larger than the first, and 

 also in the males it is always larger, and frequently greatly 

 larger than in the females. In the two species mentioned above 

 the two pairs of hands are small, the second scarcely larger than 

 the first, and there is no apparent sexual specialization. The 

 coxal plates are relatively much larger and the metasome deeper ; 

 there are also some difierences in the mouth parts, particularly 

 the first maxilla, which has a very narrow inner lobe bearing 

 not more than three plumose setae. Because of the likeness to 

 that genus, and for the uniformity in the size of the hands, the 

 name Unimelita is introduced. 



Unimelita spencepi, sp. n. 



Back considerably vaulted. Cephalon deep and as long as 

 the two succeeding segments combined. Eyes large, oblong. 

 Coxal plates of the anterior four segments of mesosome much 

 deeper than their respective segments, the first with lateral 

 margins narrowing distally, the second parallel, the fourth nearly 

 twice as wide as tlie third, and deeper than broad ; the first 

 three pairs with the inferior margins fringed with long setae, the 

 fourth unclothed. Second and third segments of metasome with 

 infero-lateral angles acute, margins entire. 



Upper antennae half the length of the body, flagellum not 

 much longer than peduncle, secondary appendage minute. 

 Lower antennae a little shoi'ter than the upper, peduncle long, 

 flagellum short, of about twelve articuli. Gnathopoda of similar 

 form, the second somewhat longer, and the propodus slightly 

 larger ; basis, ischium, and merus with postero-distal angle of 

 each furred ; carpus trigonal, equal in width to its greatest length, 

 scarcely so long as the propodus, postero-distal margin laterally- 

 expanded, furred, and bearing four transverse rows of long- 

 simple setae ; propodus subquadrate, widening distally, postero- 

 distal half expanded by a furred hyaline border, distal angle 

 rounded, palm transverse, longer than dactylus, insinuate at the 

 place Vhere the end of dactylus closes, margin fringed with about 

 twelve short apically cleft spines, and a parallel row of simple 

 setae, and near the end one very long and two or three shorter 



