G. M. Tuomson.—New Zealand Crustacea. 241 
Paramoera tenuicornis, Miers, Cat. N. Z. Crust., p. 127. Fig. C.5. 
This species, of which I have examined perfect specimens, must be 
replaced in the genus proposed by its original describer Dana, viz., Melita. 
It differs from Paramvera in having the superior antenne furnished with an 
appendage, and from Moera—in which it is placed by Spence Bate in the 
British Museum Catalogue—in having the posterior pair of pleopoda very 
unequal, with the inner ramus quite rudimentary, and not subfoliaceous. 
There are several points in connection with the specific description 
which require amending. Thus the flagellum of the inferior antenne only is 
terete, that of the upper pair having the joints wider at the apex than at 
the base; the appendage to this pair consists of 4 joints, and springs from 
the apex of the last joint of the peduncle. The fifth segment of the pleon 
is furnished on the dorsal posterior margin with a crest of spinose sete. 
The antepénultimate and penultimate pairs of pleopoda only reach to the 
extremity of the peduncle of the ultimate. The external ramus of the last 
pair is very long, while the internal is a mere rudiment. 
The specimens examined by me were taken in the Taieri River in fresh 
water, but they had probably come up with the tide, which is felt 15 miles 
from the mouth. 
Genus Gammarus, Fabricius, Ent. Syst. iL, p. 514.; Spence Bate, 
Brit. Mus. Cat. Amphip. Crust., p. 208. 
(The generic characters are taken from the latter authority quoted). 
Slender, laterally compressed. Cephalon not produced into a rostrum. 
Pereion and pleon subequal in length. Three posterior segments of the 
pleon having each two or more fasciculi of short stiff spines. Eyes 
reniform, oval or linear.  Antenns long, slender, filiform, having the 
peduncle subequal with the peduncle of the inferior, and carrying a 
secondary appendage. Mandibles having an appendage. Maxillipeds 
having a squamiform plate, arising from the basos and ischium. Gnatho- 
poda subequal, not largely developed. Pereiopoda subequal; cox of the 
three posterior pairs much shorter than those of the anterior. Posterior 
pair of pleopoda biramous. Telson double. 
18. Gammarus barbimanus, nov. sp. Fig. D.1. 
Segments of the body smooth. Eyes small, oblong, with dark coloured 
blotches between and posterior to them. Superior antenne with the 
peduncle longer than the flagellum ; basal joint with a spine on its inferior 
margin; appendage 5-jointed, less than half as long as the flagellum, which 
is about 10-jointed. Inferior antenne somewhat shorter than superior, but 
stouter ; peduncle extending to the extremity of the peduncle of the upper 
antenne ; flagellum stout, short, about 6-jointed. Maxillipeds with a dense 
al 
