364 



PALEOZOIC SYSTEM OF ROCKS. 



Fig. 480. Fig. 481. Fig. 483. 



Figs 477-484.— Coal-Ferns (after Lesquereux): 477. Pecopteris Strongii, showing fructification: 

 0, a leaflet enlarged. 478. Odontopteris Wortheni. 479. Hymenophyllites alatus. 480. Neu- 

 roptens flexuosa. 481. Neuropterie hirsuta, 482. Alethopteris lonchitica. 483. Odontopteris 

 gracilhma (after Newberry). 484. Hymenophyllites splendens (after Lesquereux). 



