162 
SPECIFIC 
Specimen whitish, mottled with olive green and 
black ; inside pearlaceous ; six orifices open. 
Inhabits the European, Atlantic, and Indian 
Oceans. 
The varieties of this species are very numerous, 
and differ much at the different stages of their 
growth. The specimen figured is less than usually 
tuberculate or plaited, and is somewhat flatter at 
the side ; but still there is little doubt of its 
belonging to the species, as the striae are precisely 
of the same description. 
Fig. 2. {interior and exterior) H. impertusa. 
Shell oblong, imperforate ; very finely striate 
transversely and longitudinally ; back convex. 
Specimen rose-colour, clouded and speckled 
with cinereous, having four dusky bands inter- 
rupted by yellow angular spots and lines ; inside 
pearlaceous. 
This beautiful little shell is justly entitled to the 
designation impertusa, being not only imperforate, 
but having no impression of an orifice ; yet will it 
hardly be denied a place in the genus Haliotis by 
any one who attentively inspects it. 
