PLATE LI. 



PAGE. 



Fig. 1. Alethopteris HoLDENi, And 420 



Lower portion of the plant. Natural size. 



Fig. 2. Alethopteris HoLDENi, And 420 



tipper portion of the plant. Natural sise. 

 2a. Nervation magnified. 



Fig. 3. Alethopteris BunburYi, And 421 



Natural size. 

 3a. Nervation enlarged. 



Fig, 4. AsTEROPHYLLlTE.S ? MlNUTltS, And 424 



4a. Portion enlarged. 



