LIST OF ILLUSTRATIONS. 



Fig. Page 



1. Animals found in tufts of Moss and Lichen .. ... 106 



2. Hydra viridis on Duckweed (Roesel) 112 



3. Representatives of Monera (Haeckel) .. 119 



4. Animal Cells (Kolliker) ..145 



5. Unicellular Organisms 152 



6. Formation of Spore in Vaucheria (Hassall) .. .. 174 



7. Development of Zoospores in Achlya (Unger) .. .. 180 



8. Development of Spores in Ascomycetous Fungi (Corda) 183 



9. Development of 'Cells' in internodes of Chara (Carter) 187 



10. Reproduction of Protomyxa (Haeckel) 194 



11. Development of Reproductive Units in Amoeba (Nicolet) 198 



12. Early Forms of Ova in Ascaris mystax (A. Thomson) .. 201 



1 3. Graafian Follicles of a Mammal (Coste) 203 



14. Portions of the Ovary of the Thrush (A. Thomson) .. 205 



15. Segmentation of the Yolk after Fecundation (Kolliker) .. 209 



1 6. Development of white blood-corpuscles .. ..226 



17. Some of the Primordial Forms of Life: Bacteria, Torulae, 



&c '.. . .. 272 



1 8. Other Early Forms of Life from Organic Infusions .. 274 



19. Oscillatoriee and other Simple Fresh-water Algse (Hassall) 276 



20. The ' Micrococci ' and ' Cryptococci ' of Hallier . . . . 284 



21. Sarcina from Saline Solutions 287 



22. Different Developmental Stages of 'Spores' (?) found in an 



Ammonic Carbonate Solution .. .. .. 290 



23. Organisms found in Infusions of Hay with Carbolic Acid 356 



