Scrobicularia, [III.] 18.

Scissurella, [XI.] 26.

Segmentina, Planorbis, [XXI.] 27, 28.

Skenea, [XIV.] 19-22.

Solen, [II.] 12-15.

Solecurtus, [II.] 17, 18.

Spirialis, [X.] 2-4.

Spirula, [XX.] 31.

Stylifer, [XV.] 21.

Succinea, [XXII.] 1-3.