PLATE XVII. 



A. 



Gen. 30.— TiENITIS, Willd. [Synopsis p. xxx.] 



Fi&. 1, Portion of pinna of T. blechwoides, ^mj. (n. s.) 



2. Fragment of the same enlarged. 



3. Spore-case, and sporangiastres. 



4. Spores. 



B. 



Gen. 31.— SCHIZOLEPTOlf, Fee. [Synopsis p. xxx.J 

 Fio, 1. Fragment of sterile frond of S. coedatum, Fh. 



2. Fragment of fertile frond of the same. 



3. Spore-case. 



4. Sporangiastre. 

 6, Spores, 



