Vintage souvenir lamps. Each comprised of a Plaster of Paris base with a main shell shade (either a conch shell or a big clam or oyster shell) with additional shells and even a plastic flamingo or mermaid to liven things up. Each has a small Christmas bulb behind the shells to make it extra festive. These were generally made for tourists in the southern States, especially Florida, so the kitsch factor is through the roof with these.
Each measures approximately 9-10” wide by 8-9” tall.