CONTENTS. xi 



4. Gelatinized Cell-walls, Plant-mucilages, and Gums. 273-282 . . 154 



a. Amyloid. 276 156 



b. Wound-gum. 277 157 



c. The Gelatinous Sheaths of the Conjugates. 278-282 . . .157 



5. Fungus Cellulose. 283, 284 160 



6. Paragalactan-like Substances. 285-287 161 



a. Reserve Cellulose. 286 162 



b. Paragalactan. 287 162 



c. Arabanoxylan. 287a 163 



7. Callus and Callose. 288-291 163 



8. Pectic Substances. 292-296 166 



9. Ash- and Silica-skeletons of the Cell-wall. 297 168 



10. On the Developmental History of the Cell-wall. 297 a-e . . . 168 



11. The Finer Structure of Cell-walls. 297 f-p ........ 170 



B. THE PROTOPLASM AND CELL-SAP. 



In General. 298 174 



i. The Nucleus and its Constituents. 299-348 175 



I. The various Methods, in General. 300-330 176 



a. Fixing Methods. 300-313 176 



b. Staining Methods. 314-327 . 180 



c. Simultaneous Fixing and Staining. 328, 329 .... 188 



d. Staining intra vitam. 330 189 



II. The Resting Nucleus and its Constituents. 331-339 . . . 190 



a. Its Recognition. 331-334 190 



b. Its Constituents. 335-339 191 



III. The Karyokinetic Figures. 340-342 192 



IV. The Inclusions of the Nucleus. 343-348 194 



12. The Centrospheres. 348 a-d 198 



3. The Chromatophores and their Inclusions. 349-364 201 



I. Methods of Investigation. 350-354 201 



II. The Finer Structure of the Chromatophores. 355-357 . . 203 



III. The Inclusions of the Chromatophores. 358-364 .... 204 



a. Protein Crystalloids. 359 205 



b. Leucosomes. 360 205 



c. Pyrenoids. 361-363 po6 



d. Oil-drops. 364 . 208 



4. The Eye-spot. 365 ,. 209 



5. The Elaioplasts and Oil-bodies. 366-370 209 



6. The Iridescent Plates of various Marine Algae. 371-372 . . . 212 



7. Microsomes and Granula. 373-375 2I2 



8. The Cilia. 376-380 214 



9. Protein-grains. 381-392 215 



a. The Fundamental Mass. 382-384 216 



b. The Crystalloids. 385-387 217 



c. The Globoids. 388-391 219 



d. Crystals. 392 221 



10. Protein Crystalloids. 393-395 222 



