LIST OF ILLUSTRATIONS 



Portrait of Ernst Heinrich Haeckel Frontispiece 



Figure Page 



1. Structure of cells of blue-green algae 13 



2. Photographs of Escherichia coli . . . 15 



3. Caulobacterialea; Myxobactralea; Cristispira Veneris 26 



4. Coccogonea; Gloiophycea 32 



5. Bangialea 42 



6. Nuclear phenomena in Polysiphonia violacea 45 



7. Heterocarpea 48 



8. Ochromonadalea 54 



9. Ochromonadalea; Silicoflagellata 56 



10. Vaucheriacea 64 



11. Choanoflagellata 68 



12. Hyphochytrialea 70 



13. Bacillariacea 72 



14. Oomycetes 78 



15. Stages of nuclear division in Stypocaulon 84 



16. Familiar kelps of Pacific North America 90 



17. Microscopic reproductive structures of Laminaria yezoensis ... 92 



18. Cryptomonadalea 97 



19. Cystoflagellata; Cilioflagellata 104 



20. Astoma 106 



21. Astoma 108 



22. Monoblepharidalea 114 



23. Chytridinea 116 



24. Zygomycetes 122 



25. Ascomycetes 132 



26. Ascomycetes 136 



27. Mycosphaerella personata 138 



28. Basidiomycetes 144 



29. Fruits of Agaricacea 153 



30. Rhizoflagellata 160 



31. Polymastigida; Trichomonadina 164 



32. Hypermastigina 170 



33. Mycetozoa 176 



34. Ceratiomyxafruticulosa 178 



35. Life cycle of "Tretomphalus" i. e., Discorbis or Cymbalo por a . . . 180 



36. Shells of Rhizopoda 184 



37. Radioflagellata 192 



38. Radiolaria; Acantharia; Monopylaria; Phaeosphaeria 196 



39. Chaos Protheus 200 



40. Sarkodina 204 



41. Life cycle of Goussia Schuhergi 208 



42. LUe cycle of Plasmodium; Babesia bigemina 212 



43. Life cycle of Myxoceros Blennius 220 



44. Infusoria, order Hypotricha 232 



45. Tokophrya Lemnarum 234 



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