8 



Fro. 2. LATERAL LINES OF RHIZOME. 

 FIG. 3. Showing 



( Bachis (Gr. rachis, a spine, ridge). 

 a. PAET OF LEAF OR FROND . . . . < Pinna (L. a feather). 



{ Pinnule (L. pinnula, a little feather). 



I. Two PINNULES VIEWED FROM BELOW ( ^dusiuiii (L. induere, to clothe) covering spore-cases. 



( Sorus (Gr. sons, a heap), a cluster of spore-cases. 

 FIG. 4. Showing FORKED VENATION AND INDUSIUM. 

 FIG. 5. SPORE-CASE OR SPORANGIUM. Showing 



Stalk. 



Case. 



Aunulus (L. a ring). In c, a small part below the spores is inadvertently uncolouretl. 



Spores. 

 FIG. G. SPORE. Showing 



Exosporiuni (Gr. exo, outside ; spora, a seed). 



Endosporium (Gr. endon, within ; spora, a seed). 



Protoplasm with oil-globules. 



Nucleus. 

 FIG. 7. DEVELOPMENT OF SPORE. Showing 



. Endosporium protruded. 



&. Divided to form a young prothallus, with root-hairs. 



c. Old prothallus with root-hairs, male organs or antheridia, and female organs or archegonia 



(Gr. archos, chief; gone, seed). 

 FIG. 8. PROTHALLUS UNDER HIGH POWER. Showing 



r Cell- wall. 



CELLS . J prot P lasm - 



' | Chlorophyll granules. 



l^ Large vacuoles filled with cell-sap. 



