PLATE XLVII. 



PAGE. 



Fig. 1. Megaloptbms ovATA, And 417 



Xermmation of frond. Katural size. 



Fig. 2. Megalopteris OVATA, And , 417 



Lower poition of plant, showing the obaracteristic short, broad leaves. Natural size. 

 2a. Nervation of decuixent portion of leaf. 



Fig. 3. IVIegaloptbris LATA, And 417 



Fragment of leaf, natural size. The leaves ai-e sometimes twice as wide. 

 So. The usual nervation. 



