W

Belidaphne hypoglypta is an extinct species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

W

Bolma tayloriana, common name Taylor's star shell, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.

W

Borealea nobilis is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Flabellinidae.

W

Calliostoma bairdii, common name the Baird's top shell, is a species of sea snail with an operculum, a marine gastropod mollusk in the family Calliostomatidae, the calliostoma top snails.

W

Calliostoma coppingeri is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

W

Calliotropis regalis, or the "regal spiny margarite", is a species of sea snail, a marine gastropod mollusk in the family Eucyclidae.

W

Calthalotia arruensis is a species of sea snail in the family Trochidae.

W

Cerithium matukense is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae.

W

Chryseofusus graciliformis is a species of sea snail, a marine gastropod mollusk in the family Fasciolariidae, the spindle snails, the tulip snails and their allies.

W

Clanculus albugo is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

W

Clanculus flosculus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

W

Curtitoma hebes is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

W

Cymatosyrinx carpenteri is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.

W

Cytharomorula lefevreiana is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.

W

Doriopsilla areolata is a species of dorid nudibranch, a colourful sea slug, a shell-less marine gastropod mollusc in the family Dendrodorididae.

W

Engina bonasia is a species of sea snail, a marine gastropod mollusk in the family Pisaniidae

W

Eucyclotoma trivaricosa is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

W

Fusinus excavatus, common name Apricot Spindle, is a species of sea snail, a marine gastropod mollusk in the family Fasciolariidae, the spindle snails, the tulip snails and their allies.

W

Gymnobela agassizii is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

W

Halgerda formosa is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae.

W

Halgerda tessellata is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae.

W

Lanistes farleri is a species of large freshwater snail, an aquatic gastropod mollusk with a gill and an operculum in the family Ampullariidae, the apple snails.

W

Limicolaria martensiana is a species of tropical air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinidae.

W

Liotina crassibasis is a species of small sea snail, a marine gastropod mollusk, in the family Liotiidae.

W

Lissomphalia bithynoides is a species of sea snail, a marine gastropod mollusk in the family Skeneidae.

W

Melanoides admirabilis is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Thiaridae.

W

Naquetia is a genus of medium-sized sea snails, marine gastropod mollusks in the family Muricidae, the rock snails or murex snails.

W

Neothauma tanganyicense is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Viviparidae.

W

Nipponotrophon stuarti is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.

W

Obtusella macilenta is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.

W

Odontosagda blandii is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Sagdidae.

W

Odostomia striata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

W

Patelloida corticata is a species of sea snail or true limpet, a marine gastropod mollusc in the family Lottiidae, the lottia limpets.

W

Paziella is a genus of sea snails, marine gastropod mollusks in the family Muricidae, the murex snails or rock snails.

W

Peltodoris atromaculata, more commonly known as the dotted sea slug or sea cow, is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Discodorididae. It dwells in salt water up to the depth of 40m. It is exclusively found in precorralligene and coralligene communities and is very common in such communities. 

W

Peristernia carotiana is a species of sea snail, a marine gastropod mollusk in the family Fasciolariidae, the spindle snails, the tulip snails and their allies.

W

Pisania luctuosa is a species of sea snail, a marine gastropod mollusk in the family Pisaniidae.

W

Pleurotomella pandionis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

W

Poirieria is a genus of large predatory sea snails, marine gastropod molluscs in the family Muricidae, the rock snails.

W

Prothalotia lesueuri, common name Lesueur's top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

W

Pterochelus is a genus of sea snails, marine gastropod mollusks in the family Muricidae, the murex snails or rock snails.

W

Purpurellus is a genus of sea snails, marine gastropod mollusks in the family Muricidae, the murex snails or rock snails.

W

Renea bourguignatiana is a species of land snail with an operculum, a terrestrial gastropod mollusk in the family Aciculidae. The survival of this species is threatened by habitat loss.

W

Siratus is a genus of sea snails, marine gastropod mollusks in the family Muricidae, the murex snails or rock snails.

W

Sukashitrochus morleti is a species of minute sea snail, a marine gastropod mollusk in the family Scissurellidae.

W

Tandonia budapestensis is a species of air-breathing, keeled, land slug, a shell-less terrestrial gastropod mollusks in the family Milacidae.

W

Tanousia runtoniana is an extinct European species of freshwater snail with gills and an operculum, a gastropod mollusk in the family Lithoglyphidae.

W

Teretia cincta is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

W

Teretia multicingula is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

W

Tiphobia horei is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Paludomidae.

W

Xeroplexa olisippensis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Geomitridae.

W

Zarateana arganica is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Geomitridae.

W

Zoila decipiens, common names the "humpback cowry" or "deceptive cowry", is a species of sea snail, a cowry, a marine gastropod mollusk in the family Cypraeidae, the cowries. This shell got its Latin name decipiens, meaning deceiving, from the fact that its damaged holotype was wrongly classified as Zoila thersites.