Annals of the South African Museum, Volume 7, Part 2South African Museum, 1898 - Natural history |
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Page 100
... margin , and the replacement of sculpture by simple ridges and lines of accretion at the frontal margin , where the ribs may then be seen to terminate at some little distance from the actual margin . For a distance of about 15 mm . from ...
... margin , and the replacement of sculpture by simple ridges and lines of accretion at the frontal margin , where the ribs may then be seen to terminate at some little distance from the actual margin . For a distance of about 15 mm . from ...
Page 115
... margin forms a straight or very gently concave outline and passes posteriorly by a curve into the short , convex siphonal margin . Anteriorly to the umbo , the valve margin slopes downwards with straight profile to the projecting ...
... margin forms a straight or very gently concave outline and passes posteriorly by a curve into the short , convex siphonal margin . Anteriorly to the umbo , the valve margin slopes downwards with straight profile to the projecting ...
Page 137
... margin . The siphonal margin is very short and shows a straight outline , directed slightly pos- teriorly when traced down to its inferior termination . In front of the umbo , the valve - margin is at first forwardly produced with a ...
... margin . The siphonal margin is very short and shows a straight outline , directed slightly pos- teriorly when traced down to its inferior termination . In front of the umbo , the valve - margin is at first forwardly produced with a ...
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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