LIST OF ILLUSTRATIONS. 



FIG. PAGE 



1. Protococcus pluvialis, ...... 3 



2. Zygncema, or Yoke-thread, ..... 5 



3. Oscillatoria, ....... 6 



4. Pandorina morwn, ...... 7 



5. Volvo x glob at or, ...... 7 



6. (a) Euglena viridis, ...... 8 



(b) E^tglena viridis, with flagellum, ... .8 



(c) Euglena viridis, with flagellum, bulbed, . . 8 



7. Cosmarium, ....... 9 



8. Closterium, ....... 9 



9. Pediastrum, . ..... 9 



10. Scenedesmics, ....... 9 



11, 12, 13. Diatoms, . . . . . .10 



14. Sections showing division in Diatom, . . . 1 1 



15. Torula, the Yeast fungus, . . . . .12 



1 6. Penidllium, a mould, . . . . 15 



1 7. Mucor, a mould, " . . . . . .16 



1 8. Puccinia, wheat rust, . . . . 17 



19. ^Ecidium, cluster-cups, . . . . 17 



20. Peronospora infestans, the potato fungus, . . 19 



21. Peronospora infestans, in section of potato leaf, . . 20 



22. Oidium, the vine fungus, . . . . .22 



23. Erysiphe, the pea fungus, . . . . .22 



24. Cells, showing alteration of form by pressure, . . 25 



25. Parenchyma, ... .... 26 



26. Sclerenchyma, . . . . . .26 



27. Fibro-vascular bundles, . . . . .26 



28. Fibro-vascular bundles, . . . . .26 



29. Bast and wood cells, . . . . . .27 



30. Dotted cells, ... . .27 



31. Spiral vessels, . . . . . -27 



32. Annular vessels, . . . . . 27 



33. Scalariform vessels from Fern, . . . -27 



34. Stomata, ....... 28 



35. Ideal form of a flowering plant, . . . .29 



36. Section through a leaf, . . . . .29 



