. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palæontological science. Paleontology. Fig. 220.—Liiuiicea pyramidnlh. Eocene. Fig. 221.—Physa cohivmaris. Eocene. <^-. Fig. 222.—Cyclostoiua Arnoudli. Eocene. of Ammonite in the so-called " Lignitic Formation " of North America ; but the beds containing this may possibly be rather referable to the Cretaceous — and this exception does not affect the fact that the AmnionilidcE, as a family, had be- come extinct before the Eocene strata were deposited. The ancient genus Naiitihis
. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palæontological science. Paleontology. Fig. 220.—Liiuiicea pyramidnlh. Eocene. Fig. 221.—Physa cohivmaris. Eocene. <^-. Fig. 222.—Cyclostoiua Arnoudli. Eocene. of Ammonite in the so-called " Lignitic Formation " of North America ; but the beds containing this may possibly be rather referable to the Cretaceous — and this exception does not affect the fact that the AmnionilidcE, as a family, had be- come extinct before the Eocene strata were deposited. The ancient genus Naiitihis still survives, the sole representative of the once mighty order of the Tetrabranchiate Cephalopods. In the order of the Dibranc/iiafes, we have a like phenomenon to observe in the total extinction of the great family of the " ; No form referable to this group has hitherto. 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. Edinburgh, London, Blackwood
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Keywords: ., bookaut, bookcentury1800, bookdecade1870, booksubjectpaleontology
