There are nearly thirty species of Donax, all extremely beautiful; that
represented in the engraving is of a whitish colour with red streaks:
it is often met with in collections of Indian shells. One of these
species is found on the English coasts, of a delicate white colour, and
streaked with pink.
[Illustration: _Donax cuneata._]
In following the system of Lamarck, we are gradually led through
various genera to two species figured on the next page, namely, the
Tellina, or _earth-shell_, and the Pandora, and, ultimately, to the
Solen, or _razor-shell_.