548 



THE DEVONIAN PERIOD. 



Fig. 192. — Devonian Ferns. 



A, Cyclopteris obtusa. F, Splienopteris pilosa. 



B, Cyclopteris valida, aud pimnile en- G, HynienophylUtes curtilobus. 



larged. H, Hymenopliyllites Gersdorffii, and por- 



C, Neuropteris polymorpha, terminal pin- tion enlarged. 



miles. I, Alethopteris discrepans. 



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



enlarged. L. Pecopteris preciosa. 



E, Sphenopteris Ilarttii. M, Alethopteris Perleyi. 



N, HynienophylUtes subfurcatus. 



