Annals of the South African Museum, Volume 7 |
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Page 201
The umbilical wall falls very steeply and the umbilical rim is bluntly rounded . The
primary ribs , commencing above the spiral suture , are narrow , and rather
weakly developed . They have a slight backward slope as they are traced ...
The umbilical wall falls very steeply and the umbilical rim is bluntly rounded . The
primary ribs , commencing above the spiral suture , are narrow , and rather
weakly developed . They have a slight backward slope as they are traced ...
Page 212
The two lowest keels on each side have a more marked upward slope than the
first lateral keel when traced forwards from the cervical groove . The surface
between the keels is flat or slightly concave , and bears very little or no granular ...
The two lowest keels on each side have a more marked upward slope than the
first lateral keel when traced forwards from the cervical groove . The surface
between the keels is flat or slightly concave , and bears very little or no granular ...
Page 260
The spines can be traced back into the tail . In the region of the dorsal fin a row of
short interspinous bones are displayed , of which eight are clearly seen . Above
these and articulating with them is a second row of interspinous bones arranged
...
The spines can be traced back into the tail . In the region of the dorsal fin a row of
short interspinous bones are displayed , of which eight are clearly seen . Above
these and articulating with them is a second row of interspinous bones arranged
...
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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 |