Tab. XX. 



A. Alsophtla comosa. Wall. — p. 53. 



Fig. 1. Portion of a fertile pinna; nat. size. Fig. 2. Portion 

 of a pinnule, upper side ; slightly magnijied. Fig. 3. Fer- 

 tile segment, under side ; magnijied. Fig. 4. Base of the 

 stipes ; nat. size. 



B. Alsophila catjdata, J. Sm. — p. 52. 



Fig. 1, 2. Portions of a fertile pinna; nat. size. Fig. 3. Por- 

 tion of a pinnule of the same, upper side; magnijied. 

 Fig. 4. Segment of the same, under side ; more magnified. 



