Annals of the South African Museum, Volume 7 |
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Page 71
Anteriorly , the flank passes abruptly , though without marked carination , into an
extensive , flat frontal face , truncating the shell . This frontal area is in no degree
sunk or concave in form . The umbones are acute and sharp , terminal at the ...
Anteriorly , the flank passes abruptly , though without marked carination , into an
extensive , flat frontal face , truncating the shell . This frontal area is in no degree
sunk or concave in form . The umbones are acute and sharp , terminal at the ...
Page 96
The valve is almost vertically truncated anteriorly and in its anterior part attains
such relatively great depth that a flattened frontal face of considerable extent
becomes developed . In the youthful stage the ribs of the flank are concentric in ...
The valve is almost vertically truncated anteriorly and in its anterior part attains
such relatively great depth that a flattened frontal face of considerable extent
becomes developed . In the youthful stage the ribs of the flank are concentric in ...
Page 99
Anteriorly , the surface of the valve curves round towards the frontal margin so as
to give the shell some appearance of anterior flattening or even truncation , most
marked in specimens of large size . The umbones are situated at about one ...
Anteriorly , the surface of the valve curves round towards the frontal margin so as
to give the shell some appearance of anterior flattening or even truncation , most
marked in specimens of large size . The umbones are situated at about one ...
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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 |