Achatinella dehayesii Morelet, 1857 accepted as Amastra assimilis (Newcomb, 1854) (original description)
Achatinella deshaysii Morelet, 1857 accepted as Amastra deshaysii (Morelet, 1857) accepted as Amastra assimilis (Newcomb, 1854) (original description)
Ampullaria ormophora Morelet, 1857 accepted as Asolene ormophora (Morelet, 1857) (original description)
Bulimus singularis Morelet, 1857 accepted as Placostylus porphyrostomus porphyrostomus (L. Pfeiffer, 1853) (original description)
Bulimus souvillei Morelet, 1857 accepted as Placostylus fibratus souvillei (Morelet, 1857) (original description)
Helicina togatula Morelet, 1857 accepted as Sturanya macgillivrayi (L. Pfeiffer, 1855) (original description)
Melania macrospira Morelet, 1857 accepted as Stenomelania aspirans (Hinds, 1844) (original description)
Melanopsis brevis Morelet, 1857 accepted as Caledomelanella frustulum (Morelet, 1857) (original description)
Melanopsis frustulum Morelet, 1857 accepted as Caledomelanella frustulum (Morelet, 1857) (original description)
Melanopsis variegata Morelet, 1857 accepted as Caledomelanella frustulum (Morelet, 1857) (original description)
Navicella caledonica Morelet, 1857 accepted as Septaria bougainvillei (Récluz, 1842) (original description)
Neritina nucleolus Morelet, 1857 accepted as Clithon nucleolus (Morelet, 1857) (original description)
Physa nasuta Morelet, 1857 accepted as Glyptophysa nasuta (Morelet, 1857) (original description)
Physa tetrica Morelet, 1857 accepted as Physastra nasuta (Morelet, 1857) accepted as Glyptophysa nasuta (Morelet, 1857) (original description)

Grand Terre Islands for Helicina togatula Morelet, 1857 
Hawaiian Islands for Achatinella dehayesii Morelet, 1857 
New Caledonia for Bulimus souvillei Morelet, 1857 
New Caledonia for Melania macrospira Morelet, 1857 
New Caledonia for Physa tetrica Morelet, 1857