e red spots arranged in rows around the spire.

~CALLIOSTOMA PELLUCIDUM~ (Plate VI.).--Fig. 3 (late Zizyphinus selectus)
is a whitish shell, covered with chestnut-coloured spots and splashes.
It is about 1-1/2 inches across.

~CALLIOSTOMA PUNCTULATUM~ (Plate VI.).--Fig. 4 (late Zizyphinus
punctulatus) is the commonest and least fragile of this family. It is
seldom more than 1-1/4 inches across. Its rounded whorls, and prominent
chestnut and white granules, make it easily distinguishable.

~TROCHUS VIRIDIS~ (Plate VI.).--Fig. 5 is a greenish, cone-shaped shell.
The interior is nacreous, and the exterior covered with coarse granules.
The base, which is flat, is greyish. The figure but faintly shows the
contour of this shell, which is a perfect cone. The young differ
somewhat from the adult shells, and have a bright pink tip to the spire.
In the plate the upper shell is a young one, and the two lower are
adults. They are found amongst rocks at low water mark, in harbours, as
well as in the surf. It is very difficult to extract the animal from the
shell. Its maximum size is one inch across.

~TROCHUS TIARATUS~ (Plate VI.).--Fig. 6 is usually white, with large grey
or brownish-purple dots and bands on both the upper surface and the
base, but it is a very variable shell. It is seldom as much as half an
inch in length, and has a nacreous interior. It is covered with fine
granules, and the base is flat. It appears to live slightly below low
water mark, and can be easily obtained by dredging in harbours. The
cup-shaped hollow at the base of the spire is much more pronounced than
in the Viridis.

There is another not shown on the plate, the Trochus chathamensis, a
small white shell, with pink or brownish-purple markings, that hitherto
has only been found in the Chatham Islands.

~ETHALIA ZELANDICA~ (Plate VI.).--Fig. 7 (late Rotella zelandica) is a
well-polished, smooth shell, washed up in large numbers on the ocean
beaches. The colours of the upper side vary, but are usually chestnut or
purple waving lines on a yellowish-white ground. On the base is a
circular band of purple round the columella, which is white. The
interior is nacreous. Occasionally a shell is entirely pink, and then
the circular band on the base is pink also. The largest shell I have
seen was nearly one inch across, and, being very flat, would be only
half an inch high. They appear to live in sandy ground, below low water
mark in the ocean; and a dredge i