WAbida cylindrica is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Chondrinidae.
WAriadnaria borealis, common name the boreal hairysnail, is a species of small sea snail, a marine gastropod mollusk in the family Capulidae, the cap snails.
WAstralium haematragum, common name the Pacific star shell, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
WCerithideopsilla conica is a species of small sea snail, a marine gastropod mollusk in the family Potamididae.
WCerithideopsis pliculosa, common name the plicate horn shell, is a species of sea snail, a marine gastropod mollusk in the family Potamididae.
WConasprella arcuata, common name the arched cone, is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
WConus retifer, common name the netted cone, is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
WCoryphella verrucosa, is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Flabellinidae. It is found on either side of the northern part of the Atlantic Ocean.
WCrepidula moulinsii is a species of sea snail, a marine gastropod mollusk in the family Calyptraeidae, the slipper snails or slipper limpets, cup-and-saucer snails, and Chinese pant snails.
WCumia reticulata, common name the false triton, is a species of sea snail, a marine gastropod mollusk in the family Colubrariidae. Out of this family, there are at least 6 species that are known to feed on blood. This trait of feeding on blood is likely shared by the entire family.
WDrymaeus serperastrus is a species of tropical air-breathing land snail, a pulmonate gastropod mollusk in the family Bulimulidae.
WEmarginula solidula is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.
WHarpa gracilis, common name the Polynesian harp, is a species of sea snail, a marine gastropod mollusk in the family Harpidae, the harp snails.
WHemipolygona recurvirostra is a species of sea snail, a marine gastropod mollusk in the family Fasciolariidae, the spindle snails, the tulip snails and their allies.
WKnefastia tuberculifera is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.
WMarginella helmatina is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.
WMarsupina nana is a species of sea snail, a marine gastropod mollusk in the family Bursidae, the frog Shells.
WMelibe rosea, the cowled nudibranch, is a species of sea slug, a dendronotid nudibranch, a marine gastropod mollusc in the family Tethydidae.
WNerita sanguinolenta is a species of sea snail, a marine gastropod mollusk in the family Neritidae.
WOlivella gracilis is a species of small sea snail, marine gastropod mollusk in the family Olivellidae, the dwarf olives.
WOppomorus noduliferus, common name the nodule castror bean, is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
WPalio dubia is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusc in the family Polyceridae.
Polygona filosa is a species of sea snail, a marine gastropod mollusk in the family Fasciolariidae, the spindle snails, the tulip snails and their allies.
WPomacea paludosa, common name the Florida applesnail, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Ampullariidae, the apple snails.
WRaphitoma philberti is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
WScutellastra mexicana is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Patellidae, one of the families of true limpets.
Semicassis bisulcata, common name: the Japanese bonnet, is a species of large sea snail, a marine gastropod mollusk in the family Cassidae, the helmet snails and bonnet snails.
Steromphala rarilineata is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Strigatella ambigua is a species of sea snail, a marine gastropod mollusk, in the family Mitridae, the miters or miter snails.
WStrigatella coffea,, is a species of sea snail, a marine gastropod mollusk in the family Mitridae, the miters or miter snails.
WTricolia tenuis is a species of sea snail, a marine gastropod mollusk in the family Phasianellidae.
WZafrona pulchella is a species of sea snail, a marine gastropod mollusk in the family Columbellidae, the dove snails.