books.google.com.ph - Volume 17.2 of the Zoological Catalogue of Australia series deals with four marine mollusc groups. The Aplacophora is a small group of worm or slug-shaped creatures, mostly found on the continental shelf or in deep seas. Polyplacophora, or chitons as they are known, are small, flat, grazing forms with...http://books.google.com.ph/books/about/Mollusca.html?id=5e4aah3VXZQC&utm_source=gb-gplus-shareMollusca
