Annals of the South African Museum, Volume 7, Part 2South African Museum, 1898 - Natural history |
From inside the book
Results 1-3 of 17
Page 188
... umbilical ribs , the steep umbilical wall , the relatively narrow and profound umbilical cavity , and the con- siderable breadth and inflation of the whorls . The involution until the shell has attained large dimensions is such that the ...
... umbilical ribs , the steep umbilical wall , the relatively narrow and profound umbilical cavity , and the con- siderable breadth and inflation of the whorls . The involution until the shell has attained large dimensions is such that the ...
Page 195
... umbilical margin . The whorl , however , is almost parallel - sided , so that the breadth of its section taken at the middle of the flank is little less than at the umbilical tubercles . The in- volution is such that about two - thirds ...
... umbilical margin . The whorl , however , is almost parallel - sided , so that the breadth of its section taken at the middle of the flank is little less than at the umbilical tubercles . The in- volution is such that about two - thirds ...
Page 208
... umbilical rim is not abruptly defined , though the surface of the flank slopes down steeply to the spiral suture . Primary ribs starting from the suture are radial in direction and are not of equal strength . At the rounded umbilical ...
... umbilical rim is not abruptly defined , though the surface of the flank slopes down steeply to the spiral suture . Primary ribs starting from the suture are radial in direction and are not of equal strength . At the rounded umbilical ...
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