Annals of the South African Museum, Volume 7, Part 2South African Museum, 1898 - Natural history |
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Page 87
... umbo and passes by a rather sharp curve into the long , gently convex inferior margin . The greatest height is at the umbo . The umbonal region is rounded and broad , and not strongly prominent . From the umbo a very faintly developed ...
... umbo and passes by a rather sharp curve into the long , gently convex inferior margin . The greatest height is at the umbo . The umbonal region is rounded and broad , and not strongly prominent . From the umbo a very faintly developed ...
Page 140
... umbo . The valves are weakly inflated , most strongly so posteriorly to the middle , and are anteriorly compressed and flattened . On the posterior side of the valve , a well - marked carinal ridge extends obliquely backwards from the umbo ...
... umbo . The valves are weakly inflated , most strongly so posteriorly to the middle , and are anteriorly compressed and flattened . On the posterior side of the valve , a well - marked carinal ridge extends obliquely backwards from the umbo ...
Page 155
... umbo is very incon- spicuous , and is situated slightly in front of the middle of the shell . The upper margin slopes down very gently in front and behind the umbo . The frontal margin is short and has a rounded convex profile ; towards ...
... umbo is very incon- spicuous , and is situated slightly in front of the middle of the shell . The upper margin slopes down very gently in front and behind the umbo . The frontal margin is short and has a rounded convex profile ; towards ...
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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