Annals of the South African Museum, Volume 7 |
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Page 167
The whorls are flattened above , and the upper surface slopes very gently away
from the spiral suture , terminating abruptly ... Already in the third whorl , a central
spiral keel makes its appearance , and this soon grows in strength , so that in the
...
The whorls are flattened above , and the upper surface slopes very gently away
from the spiral suture , terminating abruptly ... Already in the third whorl , a central
spiral keel makes its appearance , and this soon grows in strength , so that in the
...
Page 174
Height of the body - whorl at the aperture 8 8 9 Greatest width of aperture 6 5.5 6
Occurrence .-- Found by Mr. Rogers in the cliff on Buck Kraal , Sunday's River (
136h ) . Remarks.This form is distinguished from small specimens of Natica ...
Height of the body - whorl at the aperture 8 8 9 Greatest width of aperture 6 5.5 6
Occurrence .-- Found by Mr. Rogers in the cliff on Buck Kraal , Sunday's River (
136h ) . Remarks.This form is distinguished from small specimens of Natica ...
Page 206
The specimen is preserved chiefly in the form of a cast which in the greatest
portion of the ultimate whorl has retained , though ... The shell has a laterally
compressed aspect , and the whorls are relatively narrow and highly arched in
section .
The specimen is preserved chiefly in the form of a cast which in the greatest
portion of the ultimate whorl has retained , though ... The shell has a laterally
compressed aspect , and the whorls are relatively narrow and highly arched in
section .
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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 |