Annals of the South African Museum, Volume 7, Part 2South African Museum, 1898 - Natural history |
From inside the book
Results 1-3 of 47
Page 99
... prominent , strongly nodose or tubercular , and are separated by interspaces as broad as the ribs themselves ; on the frontal face the interspaces are much wider . The ribs of the posterior half of the shell are narrower and less prominent ...
... prominent , strongly nodose or tubercular , and are separated by interspaces as broad as the ribs themselves ; on the frontal face the interspaces are much wider . The ribs of the posterior half of the shell are narrower and less prominent ...
Page 105
... Prominent transverse ridges or irregular ribs cross the area in the posterior half of an adult individual , terminating above and below in the marginal tubercles and also between them . These ridges make their first appearance somewhat ...
... Prominent transverse ridges or irregular ribs cross the area in the posterior half of an adult individual , terminating above and below in the marginal tubercles and also between them . These ridges make their first appearance somewhat ...
Page 167
... prominent marginal spiral keel similar to the one above . Already in the third whorl , a central spiral keel makes its appearance , and this soon grows in strength , so that in the fourth whorl it is almost , if not quite , as prominent ...
... prominent marginal spiral keel similar to the one above . Already in the third whorl , a central spiral keel makes its appearance , and this soon grows in strength , so that in the fourth whorl it is almost , if not quite , as prominent ...
Other editions - View all
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