Annals of the South African Museum, Volume 4The Museum - Natural history |
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Page 169
... angles slightly pointed . The convexity of the shell is very slight , and the cardinal angles are flattened . The surface is covered with fine radiating striæ ( only well seen in this cast near the margins ) numbering about 120 round ...
... angles slightly pointed . The convexity of the shell is very slight , and the cardinal angles are flattened . The surface is covered with fine radiating striæ ( only well seen in this cast near the margins ) numbering about 120 round ...
Page 172
... angles are rectangular or slightly rounded . The pedicle valve is moderately convex with a shallow undefined median longitudinal depression , and the lateral angles somewhat flattened ; the beak rises above the hinge - line and is ...
... angles are rectangular or slightly rounded . The pedicle valve is moderately convex with a shallow undefined median longitudinal depression , and the lateral angles somewhat flattened ; the beak rises above the hinge - line and is ...
Page 174
... angles are rather less than right angles . The pedicle valve is gently convex , but flattened towards the cardinal angles ; the beak is small and pointed , scarcely rising above the hinge- line , which bears 3-4 spines on each side ...
... angles are rather less than right angles . The pedicle valve is gently convex , but flattened towards the cardinal angles ; the beak is small and pointed , scarcely rising above the hinge- line , which bears 3-4 spines on each side ...
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Common terms and phrases
angles Anomodonts axis baini beak beds Bokkeveld bone Brachial valve Brachiopoda British Museum Brongn browniana canine Carruthers Ceres Chonetes Cladophlebis closely described Devonian elongata Feistmantel fern figured flabellites Flora fossil fragments frond furrows Gamka Poort genus Geol Geological glabella Glossopteris grooves Gydo Pass humerus Ibid identical imperfect internal cast Journ Jurassic lamina leaf lobes lower Lystrosaurus margin maxillary median midrib Morris and Sharpe Nathorst Neuropteridium numerous odontopteroides orbignyi Palæont palate Pareiasaurus Pecopteris pedicle pedicle valve Phacops pinna pinnæ pinnules plant Plate portion posterior precoracoid preserved prevomers probably Proterosuchus pterygoid Quart rachis represented in pl resemblance Rhætic ribs rocks Salter Sandstone Saporta Schimper segments Seward shown in fig shows slightly South African species specimen Sphenopteris Spirifer Spirophyton stem Stormberg surface Taniopteris Tate teeth Theriodonts Thinnfeldia Titanosuchus type-specimen Typhloniscus Uitenhage Ulrich upper veins venation Vereeniging vertebræ viii vomer Wealden width Zamites Zeiller