274 AUSTRALIAN MALACOSTBACA. 



proximal end, palm nearly longitudinal, undefined. Pereiopoda 

 subequal, the fourth pair longer than the preceding, the joints 

 broad, the dactylos very stout. Penultimate pair of pleopoda 

 with two unequal rami, the outer shorter and narrower than the 

 inner, tipped with two acute bristles, the inner broad, armed 

 terminally and internally with a few strong bristles. Last pair 

 of pleopoda uniramous, minute, almost concealed under the broad 

 rounded telson. 

 Port Jackson. 



Genus Colomastix, G-rube. 

 Body rather slender, depressed, tapering behind, the coxae 

 low. Antennae short, strong, with the flagella rudimentary or 

 absent; the superior scarcely longer than the inferior, without a 

 secondary appendage. Maxillipedes exunguiculate. Pirst pair 

 of gnathopoda slender, exunguiculate; second stronger, sub- 

 chelate. All the pleopoda biramous, without spines ; outer 

 ramus of the sixth pair neither hook-like nor armed with spines. 

 Telson simple, laminar. 



476. Colomastix Brazieri. A.M. 



Colomastix Brazieri, Haswell, 1. c, Vol. iv., p. 341, pi. xxii., 

 fig. 4. 



Byes round, rather prominent. Superior antennae as long as 

 the cephalon and first three segments of the pereion, sub-pediform, 

 extremely stout ; peduncle slightly compressed from above down- 

 wards, trigonal ; first segment broader but shorter than the 

 second ; third half as long as the second ; flagellum rudimentary, 

 of four small articuli. Inferior antennas with the peduncle as 

 stout as that of the superior pair, slightly compressed ; flagellum 

 of one articulus, armed with a few simple, straight hairs. Epistome 

 and labrum very prominent. Anterior gnathopoda simple, filiform 

 exunguiculate, folded under the pereion, all the joints (except 

 the coxa) sub- cylindrical, slender. Posterior gnathopoda large, 

 carpus produced inf eriorly, propodos ovate, palm oblique, toothed. 

 Two anterior pairs of pereipoda stout ; three posterior pairs 

 subequal, smaller than the first two. Sixth pair of pleopoda with 

 the outer ramus short, the inner twice as long, lanceolate, acute. 

 Telson conical, compressed. Colour light green. Length about 

 f-in. 



