. The testimony of the rocks; . Fig. 17. Fig. 18. Fig. FERNS OF THE COAL MEASURES.* Rising in the scale from the lower to the higher vege-table forms of the system, — from its ferns to its trees, —we find great conifers, — so great that they must haveraised their heads more than a hundred feet over the soil;and such was their abundance in this neighborhood, that * Fig. 14, Neuropteris Loshii. Fig. 15, Neuropteris gigantea. Fig. 16,JSTeuropteris acuminata. Fig. 17, Sphenopteris affinis. Fig. 18, Pecopterisheterophylla. Fig. 19, Sphenopteris dilitata. .d i HISTORY OF PLANTS. 59 one can scar
. The testimony of the rocks; . Fig. 17. Fig. 18. Fig. FERNS OF THE COAL MEASURES.* Rising in the scale from the lower to the higher vege-table forms of the system, — from its ferns to its trees, —we find great conifers, — so great that they must haveraised their heads more than a hundred feet over the soil;and such was their abundance in this neighborhood, that * Fig. 14, Neuropteris Loshii. Fig. 15, Neuropteris gigantea. Fig. 16,JSTeuropteris acuminata. Fig. 17, Sphenopteris affinis. Fig. 18, Pecopterisheterophylla. Fig. 19, Sphenopteris dilitata. .d i HISTORY OF PLANTS. 59 one can scarce examine a fragment of coal beside oneshousehold fire that is not charged with their carbonizedremains. Though marked by certain peculiarities of struc-ture, they bore, as is shown by the fossil trunks of Grant onand Craigleith, the familiar outlines of true coniferous trees;and would mayhap have differed no more in appearancefrom their successors of the same order that now live in ourforests, than these differ from the conifers of New Zealandor o
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