10 pages matching mollusks in this book
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Acmaea Acmaeidae animal aperture apex Arca Axial ribs Bartsch Basal spiral cords Bay of Panama beaks Broderip brown C. B. Adams California to Panama California to Peru Cardiidae Carpenter 1856 Mazatlan Cassididae cells Central chromosomes Chrvsallida Coast coiling color columella Concentric sculpture crenulate Cyclostrematidae deep water dentition developed digestive tract dorsal margin Ecuador elongate Epitoniidae Epitonium Fissurella foot forms gastropods genera genus gills Glycymeridae growth lines Gulf of Calif Gulf of California Gulf of Panama hinge line hole last whorl layer ligament Lower California mantle Mazatlan Mexico mollusks muscle scar Mytilidae nodulose Noetia Nuculana Nuculidae operculum organisms outer lip oval pallial line Panama Bay Panamic Province Patellidae pelecypod Peru Pilsbry Plate portion posterior posteriorly Pyramidellidae radial ribs radula ranges from Lower riblets ridges rounded shallow water shell material sinus siphons Sowerby species sperm structure Sub-Order surface suture teeth umbos usually valve varices Veneridae whorl