42 
EMARGINULA STRIATULA (Plate IX.).—Fig. 26 is a 
whitish limpet, about an inch in length. The notch, or fissure, 
which is a peculiar feature of this shell, is seen’on the end 
of the shell facing the Lima zelandica (Fig. 21). 
CREPIDULA UNGUIFORMIS (Plate IX.).—Fig. 27 is a 
parasite shell, over an inch long, and found inside the lips of 
other shells. It is a thin, clear white shell, and is well named, 
from unguis, a finger-nail, which it much resembles. It varies in 
shape from nearly flat to semi-circular, according to the curve 
of the part of the shell on which it grows. The Crepidula shells 
are easily identified by the shelly internal appendage, or lamina, 
in which the body of the animal rests. From the peculiar effect 
of this lamina the Crepidula shell looks like a boat. This shell 
has recently been renamed Crepidula crepidula, a silly duplication, 
like Lima lima (Fig. 21). The Maori name for the Crepidula is 
the same as for a limpet, namely, Ngakahi or Ngakihi. 
CREPIDULA ACULEATA (Plate IX.).—Fig. 28 (late 
Crepidula costata) is an oval-shaped 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 
14 inches. 
There is another species of the Crepidula, viz., Monoxyla, 
similar in shape to the Crepidula aculeata, but white and smooth, 
and much smaller. 
CALYPTRZEA 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} 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 
