Annals of the South African Museum, Volume 7 |
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Page 188
Remarks .-- Some characteristic points in H. atherstoni are the strong ,
backwardly directed umbilical ribs , the steep umbilical wall , the relatively narrow
and profound umbilical cavity , and the considerable breadth and inflation of the
whorls .
Remarks .-- Some characteristic points in H. atherstoni are the strong ,
backwardly directed umbilical ribs , the steep umbilical wall , the relatively narrow
and profound umbilical cavity , and the considerable breadth and inflation of the
whorls .
Page 191
A comparison of these specimens with Sharpe's type , and other examples of H.
atherstoni , shows that in H. atherstoni the shell is much more inflated and less
discoidal : the whorl is broader in section and less highly arched . The umbilicus
is ...
A comparison of these specimens with Sharpe's type , and other examples of H.
atherstoni , shows that in H. atherstoni the shell is much more inflated and less
discoidal : the whorl is broader in section and less highly arched . The umbilicus
is ...
Page 192
The specimen is preserved unfavourably for an exhaustive comparison , but
certainly bears à very close resemblance to H. atherstoni , particularly in the
inflation of the whorls and the general character of the ribbing . Some readily
apparent ...
The specimen is preserved unfavourably for an exhaustive comparison , but
certainly bears à very close resemblance to H. atherstoni , particularly in the
inflation of the whorls and the general character of the ribbing . Some readily
apparent ...
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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 |