Elements of geology, or, The Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments elementsofgeolog00lyel Year: 1868 332 FLORA OF UPPER CRETACEOUS PERIOD [Cn. x™. Hamite (fig*. 325) and Scaphite, with other fossils, characterize this formation, which, small as is its thickness, can be traced by its organic remains to distant parts of Europe, as, for example, to the Alps. Fig. 325. Aneyloceras spinigerum, D'Orb. Syn. Ramites spitiiger, Sow. Hear Folkestone. Gault. The Blackdown beds in Devonshire, celebrated for containing many-
Elements of geology, or, The Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments elementsofgeolog00lyel Year: 1868 332 FLORA OF UPPER CRETACEOUS PERIOD [Cn. x™. Hamite (fig*. 325) and Scaphite, with other fossils, characterize this formation, which, small as is its thickness, can be traced by its organic remains to distant parts of Europe, as, for example, to the Alps. Fig. 325. Aneyloceras spinigerum, D'Orb. Syn. Ramites spitiiger, Sow. Hear Folkestone. Gault. The Blackdown beds in Devonshire, celebrated for containing many- species of fossils not found elsewhere, have been commonly referred to the Upper Greensand, which they resemble in mineral character; but Mr. Sharpe has suggested, and apparently with reason, that they are rather the equivalent of the Gault, and were probably formed on the shores of the sea, in the deeper parts of which the fine mud called Gault was deposited. Several Blackdown species are common to the Lower Cretaceous series, as, for example, Trigonia caudata, fig. 334, p. 344. We learn from M. d'Archiac, that in France, at Mons, in the valley of the Loire, strata of greensand occur of the same age as the Blackdown beds, and containing many of the same fossils. They are also regarded as of littoral origin by M. d'Archiac.* The phosphate of lime, found near Farnham, in Surrey, and near Cambridge, in such abundance as to be used largely by the agricul- turist for fertilizing soils, occurs in the Upper Greensand. It is doubt- less of animal origin, and partly coprolitic, derived from the excre- ment of fish and reptiles. In this formation near Cambridge the late M. Louis Barrett discovered, in 1858, the remains of a bird, which was rather larger than the common pigeon, and probably of the Order Natatores, and which, like most of the Gull tribe, had well-developed wings. Portions of the metacarpus, metatarsus, tibia, and femur have been detected, and the determinations of Mr.
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