Annals of the South African Museum, Volume 7South African Museum, 1913 - Natual history |
From inside the book
Results 1-5 of 31
Page 20
... profile ( p . 412 ) . 7. Crisina marginata ( d'Orbigny ) . × 12. Obverse face of part of a zoarium viewed rather from the right side , so that only the edges of the left - hand series of apertures appear ; the alternate arrangement of ...
... profile ( p . 412 ) . 7. Crisina marginata ( d'Orbigny ) . × 12. Obverse face of part of a zoarium viewed rather from the right side , so that only the edges of the left - hand series of apertures appear ; the alternate arrangement of ...
Page 48
... profile and the crowded 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 ...
... profile and the crowded 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 ...
Page 63
... profile . The whorls are in close contact , or slightly embracing . The tube is of slightly flat- tened cylindrical or oval section , the flattening at right angles to the axis of the spire . After the third whorl the tube ceases to be ...
... profile . The whorls are in close contact , or slightly embracing . The tube is of slightly flat- tened cylindrical or oval section , the flattening at right angles to the axis of the spire . After the third whorl the tube ceases to be ...
Page 68
... profile , but is likewise merely ornamented by delicately punctate linear striæ with smooth interspaces , attaining , moreover , much larger dimensions . Pecten buchi Roem . , also Upper Jurassic , is well distinguished by its almost ...
... profile , but is likewise merely ornamented by delicately punctate linear striæ with smooth interspaces , attaining , moreover , much larger dimensions . Pecten buchi Roem . , also Upper Jurassic , is well distinguished by its almost ...
Page 71
... profile straight . The straight anterior border passes at its lower end by a somewhat sudden curve into the rounded inferior border . The valves are most convex in the umbonal half and near the anterior side ; they become flatter ...
... profile straight . The straight anterior border passes at its lower end by a somewhat sudden curve into the rounded inferior border . The valves are most convex in the umbonal half and near the anterior side ; they become flatter ...
Other editions - View all
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