Here ya go:

Acmaea testudinalis - Atlantic Plate Limpet
Anachis translirata - Well-Ribbed Dove Shell
Anadara ovalis - Blood Ark
Anadara transversa - Transverse Ark
Anomia simplex - Atlantic Jingle Shell
Bittium alternatum - Alternate Bittium ( a tiny cerith-like shell)
Buccinum undatum - Northern Whelk
Busycon canaliculatum - Channeled Whelk
Crepidula convexa - Convex Slipper Shell
Crepidula fornicata - Common Atlantic Slipper Shell
Crepidula plana - Eastern White Slipper Shell
Ensis directus - Atlantic Jackknife Clam
Eupleura caudata - Thick-Lipped Drill
Geukensia demissa - Atlantic Ribbed Mussel
Hiatella arctica - Arctic Saxicave
Laevicardium mortoni - Morton's Egg Cockle
Littorina littorea - Common European Periwinkle
Littorina obtusata - Northern Yellow Periwinkle; Smooth Periwinkle
Littorina saxatilis - Northern Rough Periwinkle
Lunatia heros - Northern Moon Snail
Macoma balthica - Balthic Macoma (a type of tellin clam)
Mercenaria mercenaria - Northern Quahog; Hardshell Clam
Mesodesma arctata - Arctic Wedge Clam
Mitrella lunata - Lunar Dove Shell (a tiny species)
Modiolus modiolus - Northern Horse Mussel
Nassarius obsoletus - Eastern Mud Nassa
Nassarius trivittatus - New England Nassa
Nassarius vibex - Common Eastern Nassa
Neptunea decemcostata - New England Neptune Whelk
Nucella lapillus - Atlantic Dog Winkle
Pecten irradians - Bay Scallop
Polinices duplicatus - Atlantic Moon Snail; Sharkeye Moon Snail
Seila adamsi - Adams' Miniature Cerith
Solemya velum - Awning Clam
Spisula solidissima - Atlantic Surf Clam
Tagelus plebeius - Stout Tagelus
Urosalpinx cinerea - Atlantic Oyster Drill

Another shell spot worth checking out - the fishermens' shell dump in
Wareham, Mass.  It's 99% scallop shells, but that other 1% sometimes
includes some goodies.  I once found three huge Greenland Wentletraps
there (two of them broken, unfortunately).

Paul M.