Herper.com's mollusc pages:

• Snail raising in my snailery (1898)

Slugs and snails:

• Banana Slugs
• Raising Snails
• Cone Shells and Conotoxins
• Keeping the Giant East African Land Snail
• Freshwater Snails of Florida
• Harlequin Banana Slug
• Sea Slug Forum

Cephalopods:

• The Cephalopod Page
• Search for giant squid
• The Eurosquid
• Giant Octopus Web Page

Bivalves:

• Freshwater Mollusks Bibliography
• Tridacnid Clams