G. M. Tuomson.—On New Zealand Crustacea. 233 
similar ; propodos subquadrate, about twice as long as broad, palm nearly 
transverse, slightly oblique, with a double row of numerous, close-set, short 
spines, and its point of impingement defined by a tuft of long spines and 
sete. Cox of both pairs of gnathopoda and of the first two pairs of 
pereiopoda fringed with 10-12 simple hairs on their inferior margins. All 
the pereiopoda more or less fringed with intermingled spines and sete ; 
fourth pair the longest ; third and fourth pairs with the basa slightly dilated ; 
fifth pair short, with the basa dilated into large squamiform plates, which 
are serrated on their posterior margins. Pleopoda terminating subequally, 
their bases longer than the rami, and furnished with rows of short spines ; 
posterior pair with the rami unequal, the outer branch being 3-jointed, 
the inner simple, narrow, and acute. Telson deeply 2-cleft, the divisions 
rounded at their extremity, and with about three short subapical spines. 
Length about 85 inch. Colour yellowish; carapace of a thick, some- 
what horny consistence. 
Hab. Dredged in Paterson Inlet, 7 fathoms. 
This species was first described by Mr. Haswell, who obtained it by the 
dredge in Port Jackson; the figure given of it in the journal quoted above 
is, however, not very satisfactory. In the original description the only 
points of difference between the Australian form and ours are immaterial ; 
the flagellum of the appendage to the superior antenne being 6-jointed. 
The species is quite distinct from any other described, its nearest ally being 
the European P. holbélli, Kroyer, from which it differs in several respects. 
Genus Polycheria, W. A. Haswell. 
Linn. Soc. N.S.W. Proc., vol. iv., p. 345), 
“Pereion broad; pleon compressed, more or less carinate. Antenne 
subequal; superior pair without an appendage. Mandibles without an 
appendage. Maxillipedes with well-developed squamiform process. Gnath- 
opoda small, subchelate. Pereiopoda all prehensile, with narrow basa. 
Posterior pleopoda biramous with equal rami. Telson double.” 
Before Mr. Haswell’s description was published, I had obtained a species 
of this genus, and by a remarkable coincidence drew out a generic descrip- 
tion, giving it the name Polychelia, from its many claws. Mr. Haswell 
says of this very distinct genus, ‘‘ genus incerte sedis.” In the present con- 
fused arrangement of the genera of the sub-class Gammarides, it is certainly 
most difficult to assign it a correct position. It appears to me, however, to 
be most near Dexamine. 
1. P. obtusa, n. sp. 
Pl. XVIL., fig. 3. 
Body tumid, not compressed. Eyes large and prominent. Superior 
antenne about two-thirds as long as the body ; first joint of peduncle short 
and = second slender and twice as long, third not distinguishable from 
