top row: Melongena corona, Phalium granulatum, Busycon sinistrum, bottom row: Aequipecten purpuratus, Hysteroconcha multispinosa

top row: Melongena corona, Phalium granulatum, Busycon sinistrum, bottom row: Aequipecten purpuratus, Hysteroconcha multispinosa

Mollusks are the second most species-rich phylum of animals, after arthropods. They include gastropods (snails), bivalves (clams, scallops, oysters, etc.), cephalopods (octopuses, squids, chambered nautilus, and many extinct forms), and several smaller groups. PRI houses a collection of more than 250,000 specimens of modern (what geologists call "Recent") mollusks, including collections previously at Cornell University, especially the historic Newcomb Collection.  The combined PRI-Cornell mollusk collection is particularly strong in marine gastropods of the western Atlantic, land snails of the Pacific Islands, and freshwater bivalves of eastern North America.