C. nucleus. The kernel Corbula.
Strong, sub-triangular, under valve larger than the upper one; transversely striated; covered with a thick brownish epidermis.
C. ovalina. The ovate Corbula. Pl. [6], fig. 6.
Regular species.
C. Australis. The Australian Corbula.
Irregular species, living in stone.
2. Pandora. Two species.
Closely allied to the Corbula.
Pandora rostrata.
Pandora obtusa.