Shell Identification

[slikrep]

[attachment=159]Let me first thank you for your time and the opportunity to avail myself of this very informational site. My situation is thus. I know absolutely nothing about seashells. My 98 year old Grandmother passed away recently and she collected many odds and ends. In one box she had some seashells that she had kept over the years. I would like to ask for your assistance in viewing these photos and just letting me know if there is anything rare, out of the ordinary, or worth hanging on to. I would just hate to think I got rid of something that she had kept, if it had some sort of value to it. Otherwise, I will probably put them in an aquarium, terrarium, or something to that effect. Thank you again for your help, as I am sure it took time and effort to attain the expertise you possess.