908 



IV. MARSILEACEJE. 



Pilularia. 



Micro-sporangium 



(mag.). 



Pilularia. 



Macro-sporangium, 

 containing "a macro- 

 spore (mag.). 



Pitularia. 



Agglomerated micro- 

 spores (mag.). 



Pilularia globuli/era. 



Pilularia. 

 Microsporc (mag.). 



V 



Marsilta piibtitrm, 



If. pubftcens. 



Portion of mucous tnbc 



bearing sporangia. 



P.I ilan'a. Macrogpore sur- 



rounded by a mucilaginous 



layer (mag.). 



Pilularia. Sporocarp 



emitting the mucilaginous 



muss laden with macro- and 



micro- spores. 



Pilularia. 

 Vertical section of 

 pporocarp (mag.). 



Pilularia. 



Transverse section of 

 sporocarp (mag.). 



