d white parasite shell, with purplish lines on the edge. It is
a common shell in the North Island, and found on rocks and amongst roots
of kelp, and on the outside of other shells, especially mussels. It
varies in colour and shape, but is usually deeply ribbed, and attains a
length of 1-1/2 inches.

There is another species of the Crepidula, viz., Monoxyla, similar in
shape to the Crepidula aculeata, but white and smooth, and much smaller.

~CALYPTRAEA MACULATA~ (Plate IX.).--Fig. 29 (late Galerus zelandicus) is a
circular shell, found on rocks or kelp, and sometimes is attached to
other shells, especially mussels. It attains a width of 1-1/2 inches,
and is covered with a brown, hairy epidermis.

~HIPPONYX AUSTRALIS~ (Plate IX.).--Fig. 30 is a limpet, which takes its
name from its shape, being like a horse's foot. There was a colony of
some hundreds of this Hipponyx under a flat rock, resting on other
rocks, on the ocean side of Mount Maunganui, at the entrance to Tauranga
Harbour. Although there were thousands of other rocks round it, I never
found the Hipponyx except under the one rock I have mentioned, and as
far as I know it has never been found alive in any other part of New
Zealand.

~DENTALIUM NANUM~ (Plate IX.).--Fig. 31 is like a miniature white tusk of
an elephant. It is about 1-1/2 inches long. It is really a limpet,
which, having chosen mud and sand as its habitat, has adapted itself to
its surroundings and become long and thin, instead of broad and flat,
like the rock-loving limpet. It is found on the West Coast of Auckland
Province, especially between Manukau and Raglan.

~ACMAEA OCTORADIATA~ (Plate IX.).--Fig. 32 is one of the dozen Acmaea found
in New Zealand. It is a very flat shell, and lives amongst rocks in the
surf.

~ACMAEA PILEOPSIS~ (Plate IX.).--Fig. 33 is a nearly round, smooth limpet,
the outside being blackish, spotted with white, and the interior bluish,
with a black margin. It is about an inch across.

Amongst the other ten Acmaea found in New Zealand the most noticeable is
the Acmaea fragilis, a very delicate, thin, green shell, with narrow
brown bands. There is a green ring in the interior of the shell. It is
found under stones, and is about 1/2 inch across.

~PATELLA RADIANS~ (Plate IX., Fig. 34), and ~PATELLA STELLIFERA~ (Fig. 35)
are two representatives of the many species of beautiful limpets we
have. The limpet family has not had the attention of our scientists
which it meri