Annals of the South African Museum, Volume 7, Part 2South African Museum, 1898 - Natural history |
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Page 79
... stage had been com- pleted or the adult stage had been well entered upon , and the shell therefore perforce retained a relatively flatter and more ostreiform aspect . Exogyra imbricata might be thought , on cursory exami- nation , to ...
... stage had been com- pleted or the adult stage had been well entered upon , and the shell therefore perforce retained a relatively flatter and more ostreiform aspect . Exogyra imbricata might be thought , on cursory exami- nation , to ...
Page 109
... stage where the area is demarcated by an upper and lower marginal row of tubercles and marked by a median longitudinal row , persists until half the adult dimensions have been reached . In T. mamillata , this trituberculate stage is ...
... stage where the area is demarcated by an upper and lower marginal row of tubercles and marked by a median longitudinal row , persists until half the adult dimensions have been reached . In T. mamillata , this trituberculate stage is ...
Page 121
... stage . As the succeeding growth - stage is entered upon - that is , when the valve exceeds 8 mm . in height - the carinal angle rapidly becomes . rounded and blunt , and soon takes the form of a broad fold . The ribs of the flank are ...
... stage . As the succeeding growth - stage is entered upon - that is , when the valve exceeds 8 mm . in height - the carinal angle rapidly becomes . rounded and blunt , and soon takes the form of a broad fold . The ribs of the flank are ...
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Common terms and phrases
Acanthodiscus Ammonites angle anteriorly aperture Aptian Astarte atherstoni Sharpe baini Sharpe bank of Sunday's Belemnites carinal characters closely Coega Coega Valley collection comparison conocardiiformis convex costate Cutch d'Orb d'Orbigny delicate developed Dimensions Dunbrodie elongated Eriphyla escutcheon Exogyra fauna figured flank flattened fossils frontal genus Geol German East Africa Graaff-Reinet groove Hauterivian height herzogi Holcostephanus holubi inflated Jurassic keel Krauss last whorl left valve less Lower Cretaceous Lycett margin Marine Beds Müller narrow Neocomian Neumayr occur Oolitic Oomia beds ornamentation outline Pavlow Pecten posterior posteriorly railway relatively represent resemblance ribs ridges right valve Rogers and Schwarz sculpture shell similar South African Museum Sowerby species specimen spiral Stoliczka stowi strata Sunday's River surface suture Tate Tate's transverse Trigonia Trigonia ventricosa tubercles Uhlig Uitenhage beds Uitenhage Series uitenhagensis sp umbilical umbilicus umbo umbonal region upper W. T. Blanford whorl Zwartkop's River