The largest part of the invertebrate collection is mollusc shells. It also includes corals, sponges, crustaceans and echinoderms. These are mostly dried, with some preserved in fluid.
- Land and freshwater shells, mostly British with a strong regional focus
- Marine shells, more international in origin with specimens from many of the world’s seas and oceans
- British land and freshwater molluscs collection, with many valuable records of historical snail distribution.