Introduced species of terrestrial molluscs of British Columbia were collect
ed between 1989 and 1998. New locality records and expanded distributions a
re documented for seven introduced land snails: Lauria cylindracea (Chrysal
is Snail), Vallonia pulchella (Lovely Vallonia), Oxychilus alliarius (Garli
c Glass-snail), O. cellarius (Cellar Glass-snail), O. draparnaudi (Dark-bod
ied Glass-snail), Cepaea nemoralis (Grovesnail) and Helix aspersa (Brown Ga
rdensnail). Two other species, Vallonia excentrica (Iroquois Vallonia), and
Vitrea contracta (Contracted Glass-snail) are reported from British Columb
ia for the first time. About 25% of the terrestrial molluse species in the
province are exotic. Mechanisms of introduction include transport on nurser
y plants and on salvaged bricks. Potential impacts on native fauna include
predation by Oxychilus.