Triton, [XVIII.] 1, 2.

Trochus, [XI.] 8-20.

Trophon, [XVIII.] 20-24.

Truncatella, [XVI.] 12.

Turritella, [XV.] 1-3.

Turtonia, [VI.] 4.

Unio, [VII.] 1-3.

Valvata, [XII.] 10, 11.

Velutina, [XVI.] 21, 22.

Venerupis, [I.] 18.