Annals of the South African Museum, Volume 7 |
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Page 186
It is stated that , starting from the tubercles at the margin of the umbilical wall ,
there are groups of secondary ribs “ which bifurcate higher up and admit of
intercalary ribs . ” It would perhaps have been more correct to say that bifurcation
of the ...
It is stated that , starting from the tubercles at the margin of the umbilical wall ,
there are groups of secondary ribs “ which bifurcate higher up and admit of
intercalary ribs . ” It would perhaps have been more correct to say that bifurcation
of the ...
Page 195
The whorl is narrow and highly arched in section , and the height of the whorl -
section , measured at the middle , is almost equal to the breadth , which is
greatest at the umbilical margin . The whorl , however , is almost parallel - sided ,
so that ...
The whorl is narrow and highly arched in section , and the height of the whorl -
section , measured at the middle , is almost equal to the breadth , which is
greatest at the umbilical margin . The whorl , however , is almost parallel - sided ,
so that ...
Page 206
The involution is such that about twothirds of the flank of the preceding whorl are
embraced , thus leaving a considerable space free between the spiral suture and
the umbilical margin of the preceding whorl . The greatest breadth of the whorl ...
The involution is such that about twothirds of the flank of the preceding whorl are
embraced , thus leaving a considerable space free between the spiral suture and
the umbilical margin of the preceding whorl . The greatest breadth of the whorl ...
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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 |