Annals of the South African Museum, Volume 7South African Museum, 1913 - Natual history |
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Page 179
... umbilicus . The umbilical wall is not abruptly marked off from the flank . The whorls have a laterally compressed form , and the flanks show a slightly convex surface . The height of the whorl , measured from the umbilical rim , is ...
... umbilicus . The umbilical wall is not abruptly marked off from the flank . The whorls have a laterally compressed form , and the flanks show a slightly convex surface . The height of the whorl , measured from the umbilical rim , is ...
Page 180
... umbilicus towards the periphery . On a portion of the last whorl which measures 9 mm . from the umbilical centre to the periphery , there are 12 ribs crowded into a space of 2 mm . at the middle of the flank . There are no constrictions ...
... umbilicus towards the periphery . On a portion of the last whorl which measures 9 mm . from the umbilical centre to the periphery , there are 12 ribs crowded into a space of 2 mm . at the middle of the flank . There are no constrictions ...
Page 188
... umbilicus , but the number of umbilical tubercles is fewer than in H. atherstoni at a comparable stage of growth , and the ribs are coarser and less numerous . Neumayr and Uhlig ( 1 ) , p . 149 , Taf . xxxii . , fig . 2 . Uhlig ( 4 ) ...
... umbilicus , but the number of umbilical tubercles is fewer than in H. atherstoni at a comparable stage of growth , and the ribs are coarser and less numerous . Neumayr and Uhlig ( 1 ) , p . 149 , Taf . xxxii . , fig . 2 . Uhlig ( 4 ) ...
Page 191
... umbilicus is relatively much narrower and more profound . The umbilical wall falls more abruptly and steeply into the umbilical cavity . The involution is greater . In the French specimens the umbilicus is of a broader and shallower ...
... umbilicus is relatively much narrower and more profound . The umbilical wall falls more abruptly and steeply into the umbilical cavity . The involution is greater . In the French specimens the umbilicus is of a broader and shallower ...
Page 193
... umbilicus and less degree of involution , but to resemble it in possessing backwardly inclined umbilical ribs . Kilian has described . an ammonite from the Hauterivian of the neighbourhood of Escrag- nolles ( Maritime Alps ) as ...
... umbilicus and less degree of involution , but to resemble it in possessing backwardly inclined umbilical ribs . Kilian has described . an ammonite from the Hauterivian of the neighbourhood of Escrag- nolles ( Maritime Alps ) as ...
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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