Phiitoiiiicrographs of Botuiiical Studies. 



23.— Spores and Elators, from Fertile head of " Equisetum telmateia." 









.♦' 



spores and elaters from 

 Sporangia of No. 22. 



24. T.S. Stem of " Selaainella Wildenovii." 



r lipidermis. 



Cortical tissue. 



\'ascular bundles. 

 Xylem of bundle. 



FrebeculK. 



