1) Aggregator 2) Collector 
• (n.) One who studies, or is versed in, conchology.
Con·chol'o·gist noun (Zoology) One who studies, or is versed in, conchology. 
A conchologist is a collector of shells.
[n] - a collector and student of mollusc shells
conchologist 1. A collector and student of mollusc shells. 2. Someone who is a specialist in the branch of zoology that deals with the study of mollusks and shells. 3. A name given to the carrier-shell molluscs, based on their habit of attaching other shells, stones, etc., to their own shells.
noun a collector and student of mollusc shells