Trematode Parasitism and Polymorphism in a Marine Snail.
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.
Ewers
W H
WH
Rose
C R
CR