PLATE XI. 



A. 



Gen. 18.— LOMARIA, Willd. [Synopsis p. xxiv.l 



Fig. 1. Segment of fertUe frond of L. eloitgata, 31. (n. s.) 



2. Fragment of tlie same enlarged. 



3. Spore-case. 



4. Spores. 



B. 



Gen. 19.— BLECHWUM, Idfi. [Synopeis p. sxiv.] 



Fig 1. Portion of fertile pinna of B. okientale, Lin. (d, s.) 



2. Trag-ment of the same enlarged. 



3. Spore-case. 



4. Spores. 



5. Frag-raent of fertile frond of B. Spicawt, Sm. 



c. 



Gen. 19.*— BLECHNIDIUM, Moore. LSjnop. addenda.] 



Fig. 1. Fragment of fertUe pinna of B. MELASorrs, Moore, 

 showing tlic sorus, and netted veins on one side tlie 

 costa, (ex icon. Hoolc.) 



