Marine Shells of Puget Sound and Vicinity

Acmaea Alaska anteriorly aperture apex appressed arcuate axial ribs Barkley Sound Bartsch base beaks brown Calif callus canal Carpenter color columella Conrad convex curved Departure Bay diameter elevated elongated epidermis Gould grooves height hinge incremental lines inner lip interspaces keels last whorl left valve Length ligament lines of growth Lopez Island Lower California marked moderately narrow Nuclear whorls oblique obsolete Odostomia Operculum Orcas Island outer lip thin oval ovate pallial sinus periostracum periphery Pilsbry's Manual Conch Plate Post-nuclear whorls posterior valve posteriorly Proc prominent Puget Sound Queen Charlotte Islands radiating riblets ridges right valve San Diego San Juan Island Shell large Shell small slender slightly slits smooth spiral cords spiral striations spire striated strong summit surface suture teeth thick callus truncated Tryon & Pilsbry's Tryon Manual Conch Tryon S. S. Conch U. S. Nat umbilical umbilicus umbones valve Vancouver Island ventral Wash whorl well rounded