Annals of the South African Museum, Volume 7South African Museum, 1913 - Natual history |
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Page 3
... distal direction is about once the diameter of an aperture ; that in a direction at right angles to the last is once or less than once the diameter of an aperture . This definition does not distinguish D. compressa from Mesenteripora ...
... distal direction is about once the diameter of an aperture ; that in a direction at right angles to the last is once or less than once the diameter of an aperture . This definition does not distinguish D. compressa from Mesenteripora ...
Page 4
... distal direction . Distribution . Senonian . IDMONEIDE . GENUS IDMONEA , Lamouroux . IDMONEA VIRGULA , d'Orbigny ... distally . The only specimen of this species has a flat reverse face , but does not encrust any object . But its general ...
... distal direction . Distribution . Senonian . IDMONEIDE . GENUS IDMONEA , Lamouroux . IDMONEA VIRGULA , d'Orbigny ... distally . The only specimen of this species has a flat reverse face , but does not encrust any object . But its general ...
Page 8
... distal axis the obverse face appears convex and the reverse face concave . When the breadth of the zoarium has reached about one - third of its length , it divides into two subcylindrical branches ; one of these is broken off short ...
... distal axis the obverse face appears convex and the reverse face concave . When the breadth of the zoarium has reached about one - third of its length , it divides into two subcylindrical branches ; one of these is broken off short ...
Page 9
... distal direction more than four times the diameter of an aperture ; the apertures occur in rows of two or three across the branch ; the zoœecia are immersed and their boundaries may be faintly marked . This form is very like E. geminata ...
... distal direction more than four times the diameter of an aperture ; the apertures occur in rows of two or three across the branch ; the zoœecia are immersed and their boundaries may be faintly marked . This form is very like E. geminata ...
Page 10
... distal direction less than four diameters of an aperture ; there are four to six apertures in the breadth of a branch ; the apertures are somewhat irregularly arranged in spirals ; the zoœcia are immersed . Three ill - preserved ...
... distal direction less than four diameters of an aperture ; there are four to six apertures in the breadth of a branch ; the apertures are somewhat irregularly arranged in spirals ; the zoœcia are immersed . Three ill - preserved ...
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Common terms and phrases
Acanthodiscus adult Ammonites angle aperture Aptian Astarte atherstoni Sharpe bank of Sunday's bone Broom carinal characters closely Coega collection comparison conocardiiformis convex Cutch Cynodonts d'Orbigny developed diameter Dicynodon differs distal dorsal Dunbrodie elongated Eriphyla escutcheon Exogyra fauna figured flank flattened fossils frontal genus Geol Geological Graaff-Reinet greatest groove Gryponyx Hauterivian height herzogi Holcostephanus holubi imbricata Jurassic keel Kitchin Krauss left valve length less Lower Cretaceous Lycett Lystrosaurus margin Massospondylus narrow Neocomian Neumayr occur ornamentation outline Pareiasaurus Pavlow Pecten phalanx Plate posterior posteriorly preserved probably represented resemblance ribs ridges Right valve Rogers and Schwarz sculpture Seeley shell similar slightly South African Museum species specimen spiral stage Stoliczka Sunday's River surface suture Tate Tate's transverse Trigonia Trigonia ventricosa tubercles Uhlig Uitenhage Uitenhage beds Uitenhage Series uitenhagensis sp umbilical umbo umbonal region upper W. T. Blanford whorl zoarium Zwartkop's River