Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 654
Vaeious Foems of Foeaminifeba. [To facep 580. VITREOUS FOEAMINIFEEA :—NUMMULITES. 581 typical form is that of a double-convex lens; but sometimes itmuch more nearly approaches the globular shape, whilst in othereases it is very much flattened; and great differences exist in this Fig. 333. … A, piece of Nummulitic Limestone from Pyrenees, showingNummulites laid open by fracture through median plane; B,vertical section of Nummulite; c, Orbitoides. irespect among individuals of what must be accounted one and thesame species. Although there are some JSTummulites which closelyapproximate…
Microscopy · Biology
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