Annals of the South African Museum, Volume 7 |
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Page 115
The umbones are situated at some point lying between one - quarter and one -
third of the shell's total length from the anterior extremity ; they are well incurved
and slightly recurved . The umbonal region is fairly prominent and inflated .
The umbones are situated at some point lying between one - quarter and one -
third of the shell's total length from the anterior extremity ; they are well incurved
and slightly recurved . The umbonal region is fairly prominent and inflated .
Page 142
Tancredia schwarzi , from which it differs by its greater elongation and relatively
reduced height ; it has a more obtuse umbonal angle , and the umbonal region is
consequently considerably less prominent . Although there is also some ...
Tancredia schwarzi , from which it differs by its greater elongation and relatively
reduced height ; it has a more obtuse umbonal angle , and the umbonal region is
consequently considerably less prominent . Although there is also some ...
Page 147
The short frontal border has an evenly convex outline . The shell is greatly
inflated below the umbonal region , but the valves are compressed in the
neighbourhood of the posterior border . The outer surface of the very thin shell -
wall , so far as ...
The short frontal border has an evenly convex outline . The shell is greatly
inflated below the umbonal region , but the valves are compressed in the
neighbourhood of the posterior border . The outer surface of the very thin shell -
wall , so far as ...
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Contents
ExogyRA | 25 |
extoni Cleithrolepis S Woodward 264 | 31 |
baini Mytilus Sharpe | 33 |
8 other sections not shown
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Common terms and phrases
adult African angle anterior apertures appears atherstoni baini Band becomes beds bone border Broom characters closely collection comparable comparison considerably convex Cretaceous curved d'Orbigny described developed diameter differs direction distinct distinguished dorsal doubt elongated evidence fauna figure flank fossils front frontal further genus Geol greater greatest half height Holcostephanus individual Jurassic known lateral length less lower margin marked measures middle Museum narrow Neocomian obtained occur Oomia ornamentation outline passes Plate portion posterior present preserved probably prominent referred regarded region relatively remarks represented resemblance ribs ridges Rogers rounded sculpture seems seen separated Sharpe shell shown shows side similar single slightly South African species specimen stage Sunday's River surface Tate traced Trigonia tubercles Uitenhage umbilical umbo umbonal upper valve whorl
Bibliographic information
| Title | Annals of the South African Museum, Volume 7 Annals of the South African Museum, South African Museum |
| Author | South African Museum |
| Publisher | South African Museum, 1913 |
| Original from | University of Minnesota |
| Digitized | 4 Oct 2013 |
| Export Citation | BiBTeX EndNote RefMan |