Good articles in National Geographic for Mollusks and Shells are:
 
Explosion of Life: The Cambrian Period, NGM, October, 1993, 120-136
Money from the Sea, NGM, January, 1993, 109-117
Eye to Eye with the Giant Octopus, NGM, March, 1991, 86-97
Madagascar: A World Apart, NGM, Feburary, 1987, 148-183
Shy Monster: The Octopus, NGM, December, 1971, 776-799
Magic Lure of Seashells, NGM, March, 1969, 386-429
Tree Snails: Gems of the Everglades, NGM, March, 1965, 373-386
Little Horses of the Sea, NGM, January 1959, 131-153
On Australia's Coral Ramparts, NGM, January, 1957, 1-48
X-rays Reveal the Inner Beauty of Shells, NGM, March 1955, 427-434
Formosa- Hot Spot of the East, NGM, February, 1950, 139-176
Shells Take you over the World Horizon, NGM, July, 1949, 33-84
 
Smithsonian Magazine had a great Article on Sanibel in August 1995.
The Washington Post has a feature article on Conus in May 1995 (I forget the
exact date and I don't feel like dragging out the folder)
 
        I used to collect articles about mollusks (particularly Cephlopods and
snails). Sometimes you can purchase the old editions of NGM for pocket change
at local libraries. The ones in the Washington, DC area sell them for 15 cents
an issue and the money goes to help the public library system. I don't keep
the entire issue, I just carefully pull the article and pictures out and keep
those in a folder.
 
Gone Back into Lurking
Sarah Watson
http://www.geocities.com/southbeach/tidepool/8845