8 pages matching circular ridges in this book
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animal Aperture apex Argonaut Bay to Mozambique Bay to Natal Bay to Pondoland Bay to Port bique bivalve body whorl brown marks brownish buff Bullia capensis Cellana capensis circular ridges Coast to Mozambique collection colour brown Colour Plate columella common names Common shells Conus Cowries cream Cypraea dark brown darker deep water Dr K. H. Barnard Easy to identify edge examples False Bay Family found on beaches genus Gmelin grey greyish Ground colour white Haliotis Interior Jeffreys Bay Kei Mouth Krauss Lamarck light brown Linn locality margin mollusca Mossel Bay mottled Mozam Mussel Nassa Natal to Mozambique Operculum orange brown outer lip Outer surface pale Patella periostracum Plate 19 Plate 23 Port Alfred Port Elizabeth Port Nolloth purple reddish Reeve Saldanha Bay shape shell collectors shell known shells smooth Southern Africa Sowerby species spire Table Bay teeth Transkei Coast Turton usually valves white shell yellowish brown