Annals of the South African Museum, Volume 7South African Museum, 1913 - Natual history |
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Page 48
... ribs of the frontal series obliquely crossing the growth lines - just as in the Oomia T. recurva - there can be little doubt about the position of this shell relative to the main divisions of the genus . Whether it is more closely ...
... ribs of the frontal series obliquely crossing the growth lines - just as in the Oomia T. recurva - there can be little doubt about the position of this shell relative to the main divisions of the genus . Whether it is more closely ...
Page 49
... ribs of two series on the flank meet to form an angular pattern , and the absence of sculpture from the area and the posterior portion of the flank in the adult shell . T. heterosculpta is certainly not to be brought into comparison ...
... ribs of two series on the flank meet to form an angular pattern , and the absence of sculpture from the area and the posterior portion of the flank in the adult shell . T. heterosculpta is certainly not to be brought into comparison ...
Page 67
... ribs themselves exhibit a peculiar punctate structure on that side of the rib nearest to the lateral margin of the valve . This is developed in such a way that the outer margin of each little rib is cut into by a series of minute wedge ...
... ribs themselves exhibit a peculiar punctate structure on that side of the rib nearest to the lateral margin of the valve . This is developed in such a way that the outer margin of each little rib is cut into by a series of minute wedge ...
Page 69
... ribs with linear interspaces , increasing by division and insertion and not diverging from the middle line in the manner represented by Nilsson . The delicate transverse stria which cross the radial ornaments are scarcely comparable ...
... ribs with linear interspaces , increasing by division and insertion and not diverging from the middle line in the manner represented by Nilsson . The delicate transverse stria which cross the radial ornaments are scarcely comparable ...
Page 70
... ribs with sharp summits . Near the inferior margin the summits of the ribs are separated from one another by a distance of about 2 mm . parts of the shell the ribs are studded with numerous blunt , spinose projections . Where the ...
... ribs with sharp summits . Near the inferior margin the summits of the ribs are separated from one another by a distance of about 2 mm . parts of the shell the ribs are studded with numerous blunt , spinose projections . Where the ...
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Common terms and phrases
Acanthodiscus adult Ammonites angle aperture Aptian Astarte atherstoni Sharpe baini bank of Sunday's bone breadth Broom carinal characters closely Coega collection comparison conocardiiformis convex costate Cutch Cynodonts d'Orbigny developed diameter dorsal elongated Eriphyla escutcheon Exogyra fauna figure flank flattened fossils frontal genus Geol Geological German East Africa Graaff-Reinet groove Hauterivian height herzogi Holcostephanus holubi imbricata Jurassic keel Kitchin Krauss left valve length less Lower Cretaceous Lycett margin Massospondylus narrow Neocomian Neumayr occur Oolitic Oomia beds ornamentation outline Pareiasaurus Pavlow Pecten Plate posterior posteriorly preserved represented resemblance ribs ridges right valve Rogers and Schwarz rogersi sculpture shell similar slightly South African Museum species specimen spiral stage Stoliczka stowi Sunday's River surface suture Tate Tate's transverse Trigonia Trigonia ventricosa tubercles Uhlig Uitenhage Uitenhage beds Uitenhage Series umbilical umbilicus umbo umbonal region upper W. T. Blanford whorl zoarium Zwartkop's River