PLATE XV. 



A. 



aEN. 26.— HYMBTTOLEPIS, Klfs, [Synopsis p. xxviii.] 

 Fig 1. Upper part offertile frond of H. spicata, Preal. (n. s.) 



2. Fragment of fertile frond of the same, 



3. Fragment of sterile frond'Of the same. 



4. Spore-case and sporangiaatre. 



5. Spores, 



B. 



aEN. ^7.— GYMNOPTERIS, Bernk. [Synopsis p. xxviii.] 

 Fig. 1. Fertile frond of G. quebcie'Oxia, Bernh, (n. s.) 



2. Fragment of sterile frond of the same (n. b.) 



3. Fragment offertile frond of the same. 



4. Spore- case. 

 6. Spores. 



