Clausilia, [XXIV.] 18-21.

Clausina, [V.] 20-22.

Cochlodesma, [II.] 10.

Conovulus, [XXII.] 4-7.

Corbula, [I.] 22-24.

Crania, [IX.] 24.

Crenella, [VII.] 12-17.

Cyclostoma, [XXIV.] 25.

Cyclas, [VI.] 16-20.

Cylichna, [XX.] 4-13.