Tab. CXXI. 



A. Pteris (Eupteris) Dalhousi^, Hook. — p. ITO. 



Fig. 1. Lowest pinna; and Fig. 2. Extremity of a fertile frond; 

 nat. size. Fig. 3. Portion of a segment, with sori ; nuty- 

 nified. 



B. Pteris (Ornithopteris) scalaris, Moritz. — p. 200. 



Fig. 1 . Caudex and stipes ; and Fig. 2. Portion of the fertile 

 frond ; nat. size. Fig. 3. Sterile lobe or pinnule ; and 

 Fig. 4. Fertile pinna, seen from beneath; magnified. — [See 

 also Tab. CXLI. C. of Vol. III., for the analysis of the 

 sorus.] 



