82 



PTEllIDOSPEEMEAE 



[CH. 



a — 



Fig. 415. A, B, Heterangium. A, H. Grievii, a, leaf-traces. B, H. tiUaeoiden. 



C, root of LygtTiopteris, 



(A, B, Kidston CoU., 529, 294; C, WilHamson CoU., 1631.) 



