There are many different types of molluscs, some of which are shown below. Some of the living Classes include Bivalves (clams and such), Scaphopods (tusk shells), Gastropods (snails and slugs), Cephalopods (octopus, squid, and cuttlefish), Monoplacophora (deep sea mollusks), Aplacophora (benthic marine molluscs) and Polyplacophorans (chitons).
Vampyroteuthis infernalis (Vampire Squid)
Nautilus pompilius (Nautilus)
Nembrotha cristata (Sea slug)
Cornu aspersum (Garden Snail)
Hapalochlaena lunulata (Blue Ringed Octopus)
Chiton magnificus (Chiton)
Falcidens hartmannae
Wiwaxia corrugata (fossil). It lived in the Cambrian era.
Halkieria evangelista (fossil). It lived in the Cambrian era as well.
Orthrozanclus reburrus (artist rendition). It lived in the Cambrian era.
Phylogenetic tree complete with a wider variety of species.
Possible Mollusc family tree