Annals of the South African Museum, Volume 7, Part 2South African Museum, 1898 - Natural history |
From inside the book
Results 1-3 of 49
Page 104
... adult stages , the tubercles com- posing the ribs are well separated from one another on a given rib . In the late adult and senile stages the tubercles become closely crowded together and are contiguous . Towards the lower border of a ...
... adult stages , the tubercles com- posing the ribs are well separated from one another on a given rib . In the late adult and senile stages the tubercles become closely crowded together and are contiguous . Towards the lower border of a ...
Page 107
... adult stage , may pass over to the escutcheon on the one hand and the flank on the other . These characters contribute largely to distin- guish the group from the Clavellate , with which , both as regards the youthful ornamentation and ...
... adult stage , may pass over to the escutcheon on the one hand and the flank on the other . These characters contribute largely to distin- guish the group from the Clavellate , with which , both as regards the youthful ornamentation and ...
Page 108
... adult specimen , the ribs of T. herzogi are straight , while those of T. holubi are curved . The backward slope of the posterior flank ribs in T. herzogi is another point of distinction . There is a marked general similarity to Trigonia ...
... adult specimen , the ribs of T. herzogi are straight , while those of T. holubi are curved . The backward slope of the posterior flank ribs in T. herzogi is another point of distinction . There is a marked general similarity to Trigonia ...
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