TABLE OF CONTENTS. Xi 



CHAPTER XX. 



PAGE 



FUNGI CONTINUED (" Rusts " Uredineae) ......................... 187 



CHAPTER XXI. 

 THE HIGHER FUNGI ........................................... 195 



CHAPTER XXII. 

 CLASSIFICATION OF THE FUNGI .................................. 213 



CHAPTER XXIII. 



LIVERWORTS (Hepaticae) ........................................ 222 



Riccia, 222. Marchantia ............................ . ....... 226 



CHAPTER XXIV. 



LIVERWORTS CONTINUED . ................................... 231 



Sporogonium of Marchantia ................................. 231 



Leafy -stemmed Liverworts .................................. 236 



The Horned Liverworts ..................................... 240 



Classification of the Liverworts .................... . ......... 242 



CHAPTER XXV. 



MOSSES (Musci). .VT . .......................................... 243 



Classification of Mosses ..................................... 248 



CHAPTER XXVI. 

 FERNS. . . V". ................................................... 251 



t 



CHAPTER XXVII. 



NS CONTINUED ............................................. 262 



Gametophyte of Ferns ...................... . .......... , . . . . 262 



Sporophyte ................... ............................. 268 



CHAPTER XXVIII. 

 DIMORPHISM OF FERNS ....................... . ................. 273 



CHAPTER XXIX. 

 HORSETAILS ....... . ......... . ............................ . ---- 280 



CHAPTER XXX. . 

 CLUB-MOSSES ...... . ........................................... 284 



CHAPTER XXXI. 

 QUILL WORTS (Isoetes) .......................................... 289 



