Hurroy.—On some Branchiate Gastropoda. 128 
ones outside it; second lateral unguiculate, with four denticles; third 
lateral broader than the second, and with five dentieles. Operculwm multi- 
spiral, with a ragged edge. 
The specimen figured was collected at Auckland. 
CrnrTHIDEA NIGRA, Hombron and Jacquenot. Pl. XIV., fig. x. 
Animal black, sparingly spotted with yellowish; head-lobes marked 
with yellowish; tentacles black, with three or four rings of white. 
Dentition.—Length of central tooth rather more than half the breadth, 
reflected portion with five cusps, otherwise like C. bicarinata. First lateral 
like bicarinata, but the broad denticle often bifid; second and third laterals 
like bicarinata, but the third with six denticles. 
The specimen figured was collected at Auckland. 
MELANOPSIS TRIFASCIATA, Gray. Pl. XIV., fig. F. | 
Dentition.—Central tooth subquadrate, broader than long, the posterior 
angles sharp, the posterior margin wtth a convex, and the anterior margin 
with a concave sinuation ; reflected portion with three denticles on each side 
and a broad and pointed cutting-point, that extends under the denticles. 
First lateral broad with three or four denticles. Second lateral rather 
broad with a spoon-shaped tip provided with three blunt denticles, a clavate 
accessory piece attached to the outer posterior corner. Third lateral narrow 
expanded into a denticulate spoon-shaped apex.  Operculum oval with the 
nucleus subapical. i 
The specimen figured was sent by Mr. T. F. Cheeseman. 
JawTHINA EXIGUA, Lamarck. Pl. XIV., fig. c. 
Dentition.—Similar to that of J. communis. 
The specimen figured was given me by the Hon. G. McLean. 
NznrrA ATRATA, Lamarck. Pl. XIV., fig. n. 
Dentition.—Central tooth rather small, quadrate, longer than broad, 
posterior margin concave with a cutting-point in the centre. First lateral 
very broad, the breadth nearly three times the length, expanding outwards, 
and with a cutting-point on the inner posterior angle. Second and third 
laterals minute plates; fourth lateral with a breadth twice the length, 
arched, with a broad dark brown opaque cutting-point. Marginals numer- 
ous with smooth points. 
The specimen figured was collected at Auckland. 
There are only four laterals, and the dentition seems to connect the 
Trochide with the Chitonide, although decidedly rhipidoglossal. 
HvurroNiA BELLA, Hutton (Euchelus). Pl. XIV., fig. 1. 
Dentition.—Central tooth trilobed at the base, the central lobe smaller 
and not projecting beyond the lateral lobes, reflected portion denticulated 
on the sides.  Laterals five, similar, getting longer as they are further away 
