548 



THE DEVONIAN PERIOD. 



Fig. 192. — Devonian Ferns. 



A, Cyclopteris obtusa. F, Sphenopteris pilosa. 



B, Cyclopteris valida, and pinnule en- G, Hymenophyllites curtilobus. 



larged. H, Hymenophyllites Gersdorffii, and por- 



C, Neuropteris polymorpha, terminal pin- tion enlarged. 



miles. I, Alethopteris discrepans. 



D, Sphenopteris marginata, and portion K, Pecopteris serrulata. 



enlarged. L, Pecopteris preciosa. 



E, Sphenopteris Harttii. M, Alethopteris Perleyi. 



N, Hymenophyllites subfurcatus. 



