Annals of the South African Museum, Volume 7South African Museum, 1913 - Natual history |
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Page 7
... dorsal processes ; reverse face flat or concave ; zoĆcia three or four in a lateral series , im- mersed but the boundaries are clearly marked ; the distance between the different series of apertures is one and a half to two and a half ...
... dorsal processes ; reverse face flat or concave ; zoĆcia three or four in a lateral series , im- mersed but the boundaries are clearly marked ; the distance between the different series of apertures is one and a half to two and a half ...
Page 13
... ( either very slightly or not at all crenulate ) , with a large areola , and a few small tubercles and granules around the margin . The primary tubercles are largest at the ambitus , and smaller on the dorsal surface ( 13 )
... ( either very slightly or not at all crenulate ) , with a large areola , and a few small tubercles and granules around the margin . The primary tubercles are largest at the ambitus , and smaller on the dorsal surface ( 13 )
Page 14
South African Museum. at the ambitus , and smaller on the dorsal surface and on the base of the test . Interambulacral plates high , each bearing a large primary , imper- forate , slightly crenulate tubercle with an areola of moderate ...
South African Museum. at the ambitus , and smaller on the dorsal surface and on the base of the test . Interambulacral plates high , each bearing a large primary , imper- forate , slightly crenulate tubercle with an areola of moderate ...
Page 15
... dorsal surface ( G ) ; E , F , two dorsal valves . All x 3 . The thin median septum is joined by a short branch on each side near the cardinal margin . This valve is deeper and less curved than in most examples of Thecidea vermicularis ...
... dorsal surface ( G ) ; E , F , two dorsal valves . All x 3 . The thin median septum is joined by a short branch on each side near the cardinal margin . This valve is deeper and less curved than in most examples of Thecidea vermicularis ...
Page 16
South African Museum. The dorsal valve is oval , slightly convex , with the umbo near the margin . The internal margin is ornamented with ridges . From the median septum one or sometimes more branches come off on each side . Several ...
South African Museum. The dorsal valve is oval , slightly convex , with the umbo near the margin . The internal margin is ornamented with ridges . From the median septum one or sometimes more branches come off on each side . Several ...
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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