Annals of the South African Museum, Volume 7 |
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Page 99
... gently and regularly convex in outline , which passes by a regular and broad
curve , without break , into the lower border . This in turn has a gently convex
outline , and slopes up gradually towards the posterior margin . The greatest
height ...
... gently and regularly convex in outline , which passes by a regular and broad
curve , without break , into the lower border . This in turn has a gently convex
outline , and slopes up gradually towards the posterior margin . The greatest
height ...
Page 104
It forms posteriorly a sub - angular junction with the relatively long , slightly
convex siphonal margin . The frontal margin is very slightly convex , more seldom
quite straight , in outline , and passes below by a sharp curve or sub - angular ...
It forms posteriorly a sub - angular junction with the relatively long , slightly
convex siphonal margin . The frontal margin is very slightly convex , more seldom
quite straight , in outline , and passes below by a sharp curve or sub - angular ...
Page 167
This truncated portion is straight in profile in the earlier whorls , but becomes
gently but distinctly convex in the fourth or fifth whorls ; it is bounded below by a
prominent marginal spiral keel similar to the one above . Already in the third
whorl , a ...
This truncated portion is straight in profile in the earlier whorls , but becomes
gently but distinctly convex in the fourth or fifth whorls ; it is bounded below by a
prominent marginal spiral keel similar to the one above . Already in the third
whorl , a ...
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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 |