EXPLANATION OP THE PLATE. 



Oroanoorapht, page 44. 



Annulate Sporangia — 

 Fia. 1. Sporaugiiun with a vertical ring, mag. 100 diameters. 



2. „ horizontal ring, mag. 100 diameters. 



3. „ apical ring, mag. 100 diameters. 

 (a) Spores of each highly magnified, 200 and 300 diameters. 



Mxannulate — 

 Fi&. 4. Sporangia (two) free, opening by a vertical slit, 

 mag. 25 diameters. 



5. Sporangia united (synangium), opening by pores, mag. 7 



diameters. 



6. Sporangia united (synangium), opening by slits, mag. 9 



diameters. 

 (a) Spores of each highly magnified, 300 diameters. 



Induda — 



Fia. 7; Indusium peltate orbicular, slightly magnified. 



8. „ lateral reniform, ditto. 



9. „ calyciform, ditto. 



10. „ linear, interiorly attached, ditto. 



11. „ valvate, ditto. 



12. „ imiversd, ditto. 



