LITORINA MAURITIANA (Plate VII.).—Fig. 6 is a very common shell in the North Island, where it is found on rocks in the open sea, or in harbours up to, and even above, high water mark. The shell is under half an inch long, and usually not more than a quarter of an inch. The colour outside is bluish-white, with a broad spiral band of dark blue. The interior is violet.
DAPHNELLA LYMNEIFORMIS (Plate VII.).—Fig. 10 is a very thin, whitish shell, with irregular brown markings, and is often dredged up in the vicinity of Auckland. Its extreme length appears to be 1-1/4 inches.
SURCULA NOVÆ-ZELANDIÆ (Plate VII.).—Figs. 11 and 12 (late Drillia zelandica) is a pale rose-coloured shell, nearly 1-1/2 inches in length. It belongs to the Pleurotoma family, any of which can easily be identified by the notch in the outer lip, as shown near the centre of the figure. All of this family live below low water mark, and are obtained by dredging. It is found in both Islands.
SURCULA CHEESEMANI (Plate VII.)—Figs. 15 and 16 (late Pleurotoma) is a shell varying from pale pink to brown in colour. Interior rose or purple. The spire end is usually smooth. It is found in Auckland, and is about one inch in length.
SOLIDULA ALBA (Plate VII.).—Fig. 14 (late Buccinulus kirki) is a whitish shell, found in the North of Auckland. Its extreme length is 3/4 inch.
POTAMIDES SUB-CARINATUS (Plate VII.).—Fig. 13 (late Cerithidea subcarinata) is a dull black shell seldom over half an inch long. The colour is usually concealed by the reddish-brown epidermis. The interior is dark purple.
POTAMIDES BICARINATUS (Plate VII.).—Fig. 19 (late Cerithidea bicarinatus) is a reddish-brown or purple shell, covered with a blue or brown epidermis. The interior is purple. It is found in the North Island in large numbers on banks of sand mixed with mud near high water mark. Its extreme length is one inch.
SCALARIA ZELEBORI (Plate VII.).—Fig. 17 is the New Zealand representative of the Wentletrap family. It is a pure white shell, sometimes over an inch in length. The numerous ribs across the whorls are very prominent, and look like the steps of a ladder, whence it derives its name. It lives in the ocean below low water mark, and I have dredged it up with the Ethalia zelandica (Plate VI., Fig. 7). The Maori name is Totoro.
SCALARIA TENELLA (Plate VII.).—Fig. 18 is a dirty yellow, almost transparent, shell about a-third of an inch long. There is usually a pale brown band near the centre of the whorl. Found about half-tide mark in sheltered water.
TEREBRA TRISTIS (Plate VII.).—Fig. 20 is a bluish or blue-grey shell, slightly over half an inch in length. The interior is brownish-white, with a yellow band in the centre of the whorl. The varices on the exterior are not so prominent as in the Potamides (Fig. 13).