LIST OF ILLUSTRATIONS. 
———_—) — 
FIG. 
1. Protococcus pluvialis, . ° : 
2. Zygnema, or Yoke-thread, . : 
3. Oscillatoria, ° ° 
4. Pandorina morum, . . 
5. Volvox globator, : : 
6. (a) Luglena viridis, . 
(b) Euglena viridis, with flagellum, . : 
(c) Zuglena viridis, with flagellum, bulbed, 
Cosmarium, 
. Closterium, . - ° ° 
. EP. ediastrum, . °. e . 
. Scenedesmus, .« : = ° 
12, 13. Diatoms, . , 
Sections showing division in Diaiom, 
. Penicillium, a mould, ° . 
. Mucor, a mould, ; ‘pe aes 
. Puccinia, wheat rust, : ° 
. Torula, the Yeast fungus, . . ° 
. “Lcidium, cluster-cups, ° 
Peronospora infestans, the potato fungus, 
Peronospora infestans, in section of potato ” : 
22. Oidium, the vine fungus, . 
23. Lrysiphe, the peafungus, . 
24. Cells, showing alteration of form by pressure, 
25. Parenchyma, . ° ° ° ° 
26. Sclerenchyma, : 
27. Fibro-vascular bundles, 
. Fibro-vascular bundles, 
. Bast and wood cells, . 
. Dotted cells, . . 
. Spiral vessels, ° 
. Annular vessels, . 
. Ideal form of a flowering plant, 
. Section through a leaf, 
Scalariform vessels from Fern, 
Stomata, 
a] 
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9) 
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WOWOOUO OW ONS QUi0) 
