Page:Geology and Mineralogy considered with reference to Natural Theology, 1837, volume 1.djvu/372

 368 relative numbers of other families of plants, in each of the successive geological epochs, which are thus connected with our own, by a new and beautiful series of links, derived from one-of the most important tribes of the vegetable kingdom.

Flora of the Secondary Series presents characters of an intermediate kind between the Insular vegetation of the Transition series, and the Continental Flora of the Tertiary formations. Its predominating feature consists in the abundant presence of Cycadeæ, (see Pl. 1, Figs. 33, 34, 35,) together with Coniferæ, and Ferns. (See Pl. 1, Figs. 37, 38, 39.),

M. Ad. Brongniart enumerates about seventy species of