LIST OF ILLUSTRATIONS 



FIGURE TITLE PAGE 



Charles Darwin Frontispiece 



1 The divisions of biology 4 



2 Amoeba proteus 9 



3 Alveolar appearance of protoplasm 10 



4 Cells 21 



5 Section of a leaf 22 



6 Section of Hydra 22 



7 Types of cells 25 



8 Diagram of a cell 26 



9 Life cycle of Sphaerella 32 



10 Paramecium calkinsi 40 



11 Paramecium aurelia, dividing 41 



12 Paramecia conjugating 42 



13 Types of Bacteria 45 



14 Types of flagellation in Bacteria 46 



15 The carbon cycle 48 



16 The nitrogen cycle 49 



17 Spondylomorum 55 



18 Volvox globator 56 



19 Cleavage of Sea Urchin's egg 58 



20 Section of Frog's intestine 59 



21 Cross section of a plant stem 60 



22 Spirogyra 61 



23 Common Seaweed (Fucus) 62 



24 Giant Kelp r 63 



25 Gulf weed (Sargassum) 64 



26 Types of roots O ... 65 



27 Seasonal history of an annual plant 66 



28 Seasonal history of a biennial plant 67 



29 Aerial roots of English Ivy 67 



30 Haustoria of Dodder 68 



31 Strawberry runners 69 



32 Hyacinth bulb 70 



33 'Smilax' (Myrsiphyllum) 71 



34 Leaf of a Flowering Plant 71 



