I. FILICES. 



895 



Lygoclium palmaHtrn. 



Polystichum.- 

 Portion of fructiferous frond. 



Polystichum aculeatum. 

 Transverse section of rachis. 



Osmunda regalis. 

 Transverse section of rachis. 



Osmunda. 



Sporangium * (mag.) . 



(hit Ota, 



Transveree section of 



rachis. 



Todea africana. 

 Sporangium (mag.)* 



Scotopendrium officinale. 



Transverse section of 



rachis. 



Gleichenia, 



Portion of 



fructiferous frond. 



Gleichenia 



polypodioides. 



Transverse section 



of rachis. 



Gleichenia. 

 Sporangium (mag.). 



Gleichenia. 



Fructiferous pinnne 



(mag.). 



Aspidium. 



Portion of fructiferous 



frond. 



The annulus should have been represented as more oblique. — Ed. 



