124 Transactions.—Zoology. 
from the central tooth, denticulated on each side. Marginals denticulated 
on the outer side, those near the margin very narrow and sigmoid. Oper- 
culum horny, of few (8 or 4) whorls; pale in colour and transparent, the 
nucleus central. 
- The specimen figured was sent from Auckland by Mr. T. F. Cheeseman. 
Mr. T. W. Kirk, in the Trans. N.Z. Inst., xiv., p. 282, has proposed a 
new genus, Huttonia, to include this and two other species which he there 
describes, and the opereulum proves to be very different from that of 
Euchelus. 
AwTHORA TUBERCULATA, Gray. Pl. XIV., fig. x. 
Animal yellowish-brown, foot reddish-brown or purplish-brown ; side 
lappets and head-lobes margined with white: proboscis reddish- or purplish- 
brown, margined with white: filaments white, three on a side. The head 
lobes are smooth and rounded and joined together over the head. The 
eyes are on rather long white peduncles. Dentition similar to that of A. 
tiaratus, but the central tooth not so broad. Operculum horny, multispiral. 
The specimen figured was collected at Lyttelton. 
ZIZYPHINUS SELECTUS, Chemnitz. Pl. XIV., fig. L. 
Dentition like that of Z. punctulatus, but the first marginal appears to 
be short and broad; possibly this may be a broken specimen. 
The specimen figured was collected at Auckland. 
GIBBULA oPPRESSA, Hutton. Pl. XIV., fig. m. 
Dentition.—QCentral tooth with the posterior margin straight. Fifth 
lateral with several short cutting-points. All the cutting-points smooth. 
Operculum horny, multispiral, with radiating strie. 
The specimen figured was sent by Mr. T. F. Cheeseman from Auck- 
land. 
Marearrra (?) tnconsprcua, Hutton. Pl. XIV., fig. N. 
Dentition similar to Cantharidus. Central tooth with a slight median 
lobe on the posterior margin; the first four laterals similar, the cutting- 
point denticulated on the inner side; fifth lateral with a large cutting- 
point on the inner side and two small ones outside it. 
The specimen figured was sent from Auckland by Mr. T. F. Cheeseman. 
CaNTHARIDUS PURPURATUS, Martyn. Pl. XIV., fig. o. 
Animal pale yellowish; foot pointed behind, speckled with brown and 
transversely banded in front with reddish-brown or brown, and bordered 
with pale yellowish; rostrum greenish-yellow; head-lobes smooth; ten- 
tacles yellow or pale purplish; eye-peduncles yellowish-white, short and 
slender; filaments three on a side. Dentition normal, the central tooth 
rather broader than high. 
The specimen figured was collected at Lyttelton. 
