Amphidromus gibbus Nicolas, 1891 † accepted as Rillya gibba (Nicolas, 1891) † (original description)
Arinia distanciae Nicolas, 1891 † (original description)
Bulimus provensalis Nicolas, 1891 † accepted as Nicolasia provensalis (Nicolas, 1891) † (original description)
Diplommatina daniensis Nicolas, 1891 † accepted as Ajkaia daniensis (Nicolas, 1891) † (original description)
Diplommatina intermedia Nicolas, 1891 † accepted as Ajkaia intermedia (Nicolas, 1891) † (original description)
Diplommatina primordialis Nicolas, 1891 † accepted as Ajkaia primordialis (Nicolas, 1891) † (original description)
Goniobasis allardi Nicolas, 1891 † accepted as Melania penoti Roule, 1884 † (original description)
Helix cureti Nicolas, 1891 † (original description)
Megalomastoma elongata Nicolas, 1891 † accepted as Rognacia abbreviata (Matheron, 1832) † (original description)
Megalomastoma exigua Nicolas, 1891 † accepted as Rognacia abbreviata (Matheron, 1832) † (original description)
Physa delecta Nicolas, 1891 † (original description)
Physa gracilis Nicolas, 1891 † (original description)
Physa patula Nicolas, 1891 † (original description)
Physa pygmaea Nicolas, 1891 † (original description)
Trypanostoma ornata Nicolas, 1891 † (original description)