Annals of the South African Museum, Volume 7South African Museum, 1913 - Natual history |
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Page 8
... curved , so that in a section along the proximal - distal axis the obverse face appears convex and the reverse face concave . When the breadth of the zoarium has reached about one - third of its length , it divides into two ...
... curved , so that in a section along the proximal - distal axis the obverse face appears convex and the reverse face concave . When the breadth of the zoarium has reached about one - third of its length , it divides into two ...
Page 15
... curved or nearly straight . The area is large and triangular , with a raised pseudo - deltidium . On the exterior of the shell are growth - ridges parallel to the margin of the valve . In the interior of the valve are narrow ...
... curved or nearly straight . The area is large and triangular , with a raised pseudo - deltidium . On the exterior of the shell are growth - ridges parallel to the margin of the valve . In the interior of the valve are narrow ...
Page 78
... curved near the apex , but straight in the portion representing the later growth - stages . This abundant and characteristic shell has given rise to some differences of opinion concerning its generic position within the Ostreide , which ...
... curved near the apex , but straight in the portion representing the later growth - stages . This abundant and characteristic shell has given rise to some differences of opinion concerning its generic position within the Ostreide , which ...
Page 81
... curved specimens of the African form . " 6 Ostrea tardensis Stanton , ¶ from the Lower Cretaceous Gio beds of Patagonia , may , in selected individuals , somewhat closely approach E. imbricata , but its near relationship to this must be ...
... curved specimens of the African form . " 6 Ostrea tardensis Stanton , ¶ from the Lower Cretaceous Gio beds of Patagonia , may , in selected individuals , somewhat closely approach E. imbricata , but its near relationship to this must be ...
Page 82
... curved outline of the posterior margin . The antero - ventral area is flat , and its surface is perpendicular * Coquand ( 2 ) , p . 158 . Remes ( 1 ) , pl . xxi . ( iv . ) , figs . 2a , 2b . § Douvillé ( 1 ) , p . 230 , pl . xii ...
... curved outline of the posterior margin . The antero - ventral area is flat , and its surface is perpendicular * Coquand ( 2 ) , p . 158 . Remes ( 1 ) , pl . xxi . ( iv . ) , figs . 2a , 2b . § Douvillé ( 1 ) , p . 230 , pl . xii ...
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Common terms and phrases
Acanthodiscus adult Ammonites angle aperture Aptian Astarte atherstoni Sharpe baini bank of Sunday's bone breadth Broom carinal characters closely Coega collection comparison conocardiiformis convex costate Cutch Cynodonts d'Orbigny developed diameter dorsal elongated Eriphyla escutcheon Exogyra fauna figure flank flattened fossils frontal genus Geol Geological German East Africa Graaff-Reinet groove Hauterivian height herzogi Holcostephanus holubi imbricata Jurassic keel Kitchin Krauss left valve length less Lower Cretaceous Lycett margin Massospondylus narrow Neocomian Neumayr occur Oolitic Oomia beds ornamentation outline Pareiasaurus Pavlow Pecten Plate posterior posteriorly preserved represented resemblance ribs ridges right valve Rogers and Schwarz rogersi sculpture shell similar slightly South African Museum species specimen spiral stage Stoliczka stowi Sunday's River surface suture Tate Tate's transverse Trigonia Trigonia ventricosa tubercles Uhlig Uitenhage Uitenhage beds Uitenhage Series umbilical umbilicus umbo umbonal region upper W. T. Blanford whorl zoarium Zwartkop's River