People keep asking where the names come from, but they less often ask where
they go when they are rendered invalid by synonymy or homonymy. Some
wonderful names have been lost, and just because they chose the wrong date
to be named. So, for example, Brontosaurus was named after Apatosaurus,
Amphioxus after Branchiostoma, and Washingtonia after Sequoia (also a very
nice name, I hasten to add). These examples are drawn respectively from the
dinosaurs, lancelets, and conifers.

What are some examples of lost but lovely names in the Mollusca?

Andrew K. Rindsberg
Geological Survey of Alabama