Memoirs of the Geological Survey of Pakistan, Volumes 5-6The Survey, 1969 |
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Page 18
... direction , six in number , crossed by a faint spiral line along the posterior margin of the shoulder , somewhat tuberculated at the point of intersection ; the last whorl bears more pronounced spiral lines on abapertural side , about ...
... direction , six in number , crossed by a faint spiral line along the posterior margin of the shoulder , somewhat tuberculated at the point of intersection ; the last whorl bears more pronounced spiral lines on abapertural side , about ...
Page 29
... direction ; umbones larger ; right valve thin but much inflatated than the left one ; anterior margin long an convex ; ventral margin rounded ; posterior margin long , convex in postero- ventral region and slightly concave in postero ...
... direction ; umbones larger ; right valve thin but much inflatated than the left one ; anterior margin long an convex ; ventral margin rounded ; posterior margin long , convex in postero- ventral region and slightly concave in postero ...
Page 30
... direction of growth . The umbonal region is prominent and inflated . The specimens have larger dimensions than the holotype . The dimensions of the largest specimen are : length 42.0 mm . , height 28.0 mm . , thickness ( both valves ...
... direction of growth . The umbonal region is prominent and inflated . The specimens have larger dimensions than the holotype . The dimensions of the largest specimen are : length 42.0 mm . , height 28.0 mm . , thickness ( both valves ...
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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