PLATE L. 



PAGE. 



Fig, 1. Orthogoniopteris clara, And 419 



Plant natural size. The rounding of the base of upper aide of leaves is dimly seen in 

 specimen, but is not represented in the figure, 

 la. Nervation enlarged. 



Fig. 2. Orthogoniopteris Gilberti, And 420 



Natural size. This species shows the upper basal margin of the leaves. 



Fig. 3. Alethopteris maxima, And 421 



Natural size. Fragment of leaf. 

 3a. Termination of leaf. 

 3&. Nervation somewhat magnified. 



