CHAPTER X.. How Plants Obtain Their Food, Ii. 97

HOW PLANTS OBTAIN THEIR FOOD, II. 97 Seedlings, 97 Digestion, 107 Assimilation 109

CHAPTER XI. RESPIRATION. 110

CHAPTER XII. GROWTH. 118

CHAPTER XIII. IRRITABILITY. 125

PART II. MORPHOLOGY AND LIFE HISTORY OF REPRESENTATIVE PLANTS.

CHAPTER XIV. SPIROGYRA. 136

CHAPTER XV. VAUCHERIA. 142

CHAPTER XVI. ŒDOGONIUM. 147

CHAPTER XVII. COLEOCHÆTE. 153

CHAPTER XVIII. CLASSIFICATION AND ADDITIONAL STUDIES OF THE ALGÆ. 158

CHAPTER XIX. FUNGI: MUCOR AND SAPROLEGNIA. 177

CHAPTER XX. FUNGI CONTINUED (“Rusts” Uredineæ). 187

CHAPTER XXI. THE HIGHER FUNGI. 195

CHAPTER XXII. CLASSIFICATION OF THE FUNGI. 213

CHAPTER XXIII. LIVERWORTS (Hepaticæ). 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