Annals of the South African Museum, Volume 7South African Museum, 1913 - Natual history |
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Page 3
... angles to the last is once or less than once the diameter of an aperture . This definition does not distinguish D ... angle between the surface and the direction of the zoœcia at that level . It is possible that in M. Hyselyi the ...
... angles to the last is once or less than once the diameter of an aperture . This definition does not distinguish D ... angle between the surface and the direction of the zoœcia at that level . It is possible that in M. Hyselyi the ...
Page 33
... angle on either side and a circular aperture , but the true S. plicatilis Goldf . has only a single central , longitudinal keel . S. quinquangularis Goldf . ‡ ( Upper Jurassic ) stands much closer in its characters , and a Serpula ...
... angle on either side and a circular aperture , but the true S. plicatilis Goldf . has only a single central , longitudinal keel . S. quinquangularis Goldf . ‡ ( Upper Jurassic ) stands much closer in its characters , and a Serpula ...
Page 63
... angles to the axis of the spire . After the third whorl the tube ceases to be coiled and becomes free . The surface of the tube is marked by numerous irregular transverse wrinkles and furrows . Dimensions.- Greatest diameter across the ...
... angles to the axis of the spire . After the third whorl the tube ceases to be coiled and becomes free . The surface of the tube is marked by numerous irregular transverse wrinkles and furrows . Dimensions.- Greatest diameter across the ...
Page 70
... angle ( about 80 ° ) . The inflation is slight , with the left . valve a little more convex than the right . The valves are ornamented by about 22 strong , angular ribs with sharp summits . Near the inferior margin the summits of the ...
... angle ( about 80 ° ) . The inflation is slight , with the left . valve a little more convex than the right . The valves are ornamented by about 22 strong , angular ribs with sharp summits . Near the inferior margin the summits of the ...
Page 71
... angle with the anterior border . The anterior ear is rudimentary or not developed ; the posterior ear is much reduced , and not definitely demarcated from the flank . The ornamentation consists of delicate linear radial grooves , very ...
... angle with the anterior border . The anterior ear is rudimentary or not developed ; the posterior ear is much reduced , and not definitely demarcated from the flank . The ornamentation consists of delicate linear radial grooves , very ...
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Common terms and phrases
1st phalanx Ammonites angle aperture Aptian articular Astarte atherstoni Sharpe baini bank of Sunday's bone Broom carinal characters closely Coega collection comparison convex Cutch Cynodonts Cynognathus d'Orbigny Dicynodon differs distal dorsal dorsal fin elongated Exogyra fauna figured flank flattened fossils front frontal genus Geol Geological Graaff-Reinet greatest Gryponyx Hauterivian height herzogi Holcostephanus humerus imbricata Jurassic keel Krauss Left valve length Lower Cretaceous Lystrosaurus margin Massospondylus maxilla measures narrow Neocomian Neumayr occur Oomia ornamentation outline Pareiasaurus Pecten phalanx Plate portion posterior posteriorly preserved probably Propappus represented resemblance ribs ridges Right valve Rogers and Schwarz rogersi sculpture Seeley shell side similar skull slightly South African Museum species specimen Sunday's River surface suture Tate transverse Trigonia tubercles Uhlig Uitenhage Uitenhage beds Uitenhage Series uitenhagensis sp umbilical umbo umbonal region upper ventricosa W. T. Blanford whorl width zoarium Zwartkop's River