. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. THE CRETACEOUS PERIOD. 263 portant group of the Palms. It is thus a matter of interest to reflect that plants closely related to those now inhabiting the. 186 —Cretaceous Angiosperms. a, Sassafras Cretaceuin ; b, Liriodeiidron Meekii; c, Leguminosites Marcotianus ; d, Salix Meekii. (After Dana.) earth, were in existence at a time when the ocean was tenanted by Ammonites and Belemnites, and when land and sea and air were peopled by the extraordinary ext
. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. THE CRETACEOUS PERIOD. 263 portant group of the Palms. It is thus a matter of interest to reflect that plants closely related to those now inhabiting the. 186 —Cretaceous Angiosperms. a, Sassafras Cretaceuin ; b, Liriodeiidron Meekii; c, Leguminosites Marcotianus ; d, Salix Meekii. (After Dana.) earth, were in existence at a time when the ocean was tenanted by Ammonites and Belemnites, and when land and sea and air were peopled by the extraordinary extinct Reptiles of the Mesozoic period. As regards animal life, the Protozoans of the Cretaceous period are exceedingly numerous, and are represented by Fora- mifiifera and Sponges. As we have already seen, the White Chalk itself is a deep-sea deposit, almost entirely composed of the microscopic shells of Foraminifers, along with Sponge- spicules, and organic ^^(^r/j-of different kinds (see p. 22, hg. 7). The green grains which are so abundant in several minor sub- divisions of the Cretaceous, are also in many instances really casts in glauconite of the chambered shells of these minute organisms. A great many species of Formninifera have been recognised in the Chalk; but the three principal genera are. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nicholson, Henry Alleyne, 1844-1899. New York, A. L. Fowle
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Keywords: ., bookcentur, bookdecade1870, booksubjectpaleontology, bookyear1876
