Animals

Mollusca

These are animals which all have a shell secreted by the mantle, are bilaterally symmetrical and have a large fleshy foot (for locomotion or as tentacles). This group is dominated by cephalopods, gastropods and bivalves.

Classes:

Monoplacophora

Polyplacophora

Gastropoda

Cephalopoda

Bivalvia

For more information:

http://www.ucmp.berkeley.edu//taxa/inverts/mollusca/mollusca.php

http://www.palaeos.com/Invertebrates/Molluscs/Mollusca.htm