ith every conceivable colour. It is rare, and usually found on the
sheltered side of small islands in the open sea.

~GLYCYMERIS LATICOSTATA~ (Plate IX.).--Fig. 3 (late Pectunculus
laticostatus) is a very solid, reddish-brown shell, sometimes
(especially in the immature shells) splashed with chestnut and white.
The six or eight teeth near the hinge on both valves are of even size
and shape. It is usually found cast up on ocean beaches. The shell
attains a length and breadth of three and a-half inches. The younger
shells have ridges or ribs on the outside, but these wear off with age.
The Maori name is Kuakua.

~GLYCYMERIS STRIATULARIS~ (Plate IX.).--Fig. 4 (late Pectunculus
striatularis) is a small brownish shell, irregularly marked with
chestnut, red, or white. The interior is whitish and brown, the exterior
being smooth, and the extreme length of the shell about an inch. The
markings of the hinge and teeth are similar to those of the Glycymeris
laticostata.

~CARDITA AVICULINA~ (Plate IX.).--Fig. 5 (late Mytilicardia excavata) is
an irregular-shaped white shell, with yellow, pink, or dirty brown
markings. The longitudinal grooves on the outside are very rugged and
deep. The shell is over an inch in length, and is found in both Islands
and in Australia.

~RHYNCHONELLA NIGRICANS~ (Plate IX.).--Fig. 6 is an irregular-shaped,
ribbed, black or dark brown shell, the left valve being much more
rounded than the other. It is found up to one and a-quarter inches in
breadth in the South Island and in the Bay of Plenty.

~TEREBRATELLA SANGUINEA~ (Plate IX.).--Fig. 7 (late Terebratella cruenta)
is an orange-red, evenly ribbed, shell up to one and three-quarter
inches in breadth, found in the South Island. The left valve in this
shell is nearly flat.

~TEREBRATELLA RUBICUNDA~ (not shown on plate) is a smooth, pink, or dark
red shell, of the same shape, but only half the size, of the
Telebratella sanguinea, and found in considerable numbers in both
Islands amongst stones. It is particularly plentiful amongst the stones
on Rangitoto Island, in Auckland Harbour.

~MAGELLANIA LENTICULARIS~ (late Waldheimia lenticularis) is not shown in
the plate, but is a large, smooth, red or brown shell, two inches long,
similar in shape to the above. All the above four shells, namely, the
Rhynchonella, Terebratella (2), and Magellania, belong to the
Terebratula family, and the right valve is longer than the left, and
there is a small round