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 a thick, rough grey or brown coralline growth. The length is under half an inch; and it is found in the North Island amongst rocks on partly-sheltered beaches.

TROPHON PLEBEIUS (Plate VII.).—Fig. 23 (late Kalydon plebeius) is a brown or slate-coloured shell half an inch in length. The interior is reddish-purple, with six or eight narrow darker lines on the whorl.

TRICOTROPIS INORNATA (Plate VII.).—Fig. 94 is a pale brown or white shell, under half an inch in length, and found all over New Zealand,

MARINULA FILHOLI (Plate VII.).—Fig. 5 is a pale chestnut-coloured shell, with two large and one small white plaits on the inner lip. It is about a-third of an inch long, and is found in Auckland and Massacre Bay.

TRALIA AUSTRALIS (Plate VII.).—Fig. 26 (late Ophicardelus costellaris) is a brown, horny-looking shell, over half an inch long. It has two plaits on the inner lip. It is found in Auckland amongst mangroves near high water mark, and is also found in Australia. The maturer shells have narrow, dark brown bands on them.

TURRITELLA VITTATA (Plate VII.).—Fig. 27 is a yellowish-white shell, with spiral brown bands. It is under two inches in length, and found in the North Island.

TURRITELLA ROSEA (Plate VII.).—Fig. 28 is a reddish-brown, or yellowish, shell, finely banded with purplish-brown. It is found over three inches in length, and, though common enough in the North Island, is rare in the South. It is found amongst grassy banks during very low tides, point down, and almost buried in the sand. A sand bank of considerable size near Rangiawahia, in Tauranga Harbour, was inhabited by nothing but Turritella rosea. Four other kinds of Turritellæ are found in New Zealand, all smaller, but similar to the above.

TRIVIA AUSTRALIS (Plate VII.).—Fig. 29 is the New Zealand Cowry shell. It is less than ½ inch in length, and is white, with one or more flesh-coloured spots. It is fonnd in the Northern part of Auckland Province and in Australia.

CYLICHNA STRIATA (Plate VII.).—Fig. 30 is a small, very narrow, smooth white shell. It is found in Auckland.