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Updated: May 10, 2025
The place of the sandstones of the Foreland is not yet clearly made out, as they are cut off by a great fault and disturbance. Spirifera disjuncta, Sowerby. Syn. Sp. Verneuilii, Murch. Phacops latifrons, Bronn. Clymenia linearis, Munster. The fossils are numerous, and comprise about 150 species of mollusca, a fifth of which pass up into the overlying Carboniferous rocks.
Out of some half dozen fossil bison which have been described from America, none earlier than the latest Tertiary, Bison latifrons from the Pleistocene seems likely to have been the immediate ancestor of recent American species, and as the one skull of the woodland bison which has been examined resembles both latifrons and the European species more than the plains species does, it seems probable that these two more nearly represent the primitive bison, of which the former inhabitant of the prairies is a more modified descendant.
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