Memoirs of the Geological Survey of Pakistan, Volumes 5-6The Survey, 1969 |
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Page 17
... flat - topped , prominent radial ribs , about forty - two in number , much wider than their intervals which are sharp , smooth , regularly spaced depressions ; ribs comparatively narrow in the umbonal area , becoming wider towards ...
... flat - topped , prominent radial ribs , about forty - two in number , much wider than their intervals which are sharp , smooth , regularly spaced depressions ; ribs comparatively narrow in the umbonal area , becoming wider towards ...
Page 19
... flat sides ; ornamentation consists of oblique varices , regularly spaced , five in number , moderately thick , separated by flat or slightly concave interspaces which are about three times the width of the varices ; the varices are not ...
... flat sides ; ornamentation consists of oblique varices , regularly spaced , five in number , moderately thick , separated by flat or slightly concave interspaces which are about three times the width of the varices ; the varices are not ...
Page 29
... flat - topped radial ribs , one and half times broad than their intervals and the ribs produce crenulation on ventral margin . Family Vulsellidae Genus Vulsella Bolten , in Roding , 1798 ( p . 156 ) [ Type species Vulsella major Bolten ...
... flat - topped radial ribs , one and half times broad than their intervals and the ribs produce crenulation on ventral margin . Family Vulsellidae Genus Vulsella Bolten , in Roding , 1798 ( p . 156 ) [ Type species Vulsella major Bolten ...
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Common terms and phrases
abapertural view aperture appears Arch Archiac & Haime band broadly Chharat consists convex Corbula Cossmann & Pissarro Cotter Cretaceous Description Deshayes designation differs dimensions District D. G. Khan Domanda shale dorsally Drazinda shale Drug section exterior left valve Family fauna feet figured Formation forms fossil Further distribution gastropod Genus Geol geology Ghazij fm gray Group height holotype India intervals Iqbal Italy Jhalar Kohat Lamarck larger length Limestone lines Linne Locality Lower Eocene margin Middle Eocene monotypy ornament Ostrea outline pakistanica Eames Paleocene Paris pelecypod PLATE pointed posterior preserved prominent Quetta Rakhi Nala Range Recent Remarks ribs right valve rounded Shahrig shell short similar slightly soriensis Eames specimen spiral Surv suture thick thin threads Type number.-Specimens type occurrence Type species UCLA umbonal Upper ventral Vredenburg West Pakistan whorls Zinda Pir section