title: Trematode Parasitism and Polymorphism in a Marine Snail.
abstract: Velacumantus australis is a common Australian snail which harbors several larval trematodes. Many populations have a small proportion of banded shells. Analysis of three samples from a coastal lake shows that banded snails are less likely to harbor larval trematodes than unbanded snails.
authors.forename: W H
authors.initials: WH
authors.lastname: Ewers
authors.forename: C R
authors.initials: CR
authors.lastname: Rose