Gouldia cerina
Original description, by Adams (1845, p. 9):
"T. t. parva, lineis elevatis concentricis distantibus et striis radiantibus ornata, cerina ; lunula vulvaque transversim rubro lineatis ; umbonibus minimis, acutis, pallide virentibus ; margine supra angulato, alibi rotundato ; pallii impressione subsinuata. Long. .42 poll. ; alt. .39 poll. ; lat. .21 poll."