LIST OF ILLUSTRATIONS 



Frontispiece 



1. Jansen s Micaroscope 2 



2. Cells of Saccharomyces cerevisice 16 



3. Cells made up of energids 16 



4. Diffuse nuclei of bacteria 17 



5. Nuclei in Cyanophycete 17 



6. Chromidia in protozoa 18 



7. MiCTO- and macro-nucleus in an infusorian 19 



8. Division of micro-nucleus and chondriosomes . . 19 



9. Formation of chloroplasts 20 



ro. Mitochondria developing into amyloplasts 21 



11. Chloroplasts of different forms 21 



12. Metachromatic corpuscles 23 



13. Illustrating cyst and thread membranous walls . 24 



14. Organs of locomotion in bacteria ... 25 



15. Division of Spongomonas uvella and Monas termo 26 



16. Transverse section illustrating trichocysts and cilia attachments . . 26 



17. Schizogony in AmcBha polypodea 27 



18. Sporogony in Saccharomyces cerevisie, B. mycoides and Leucocytozoon 



lovati. 27 



19. Karyokinesis in Acanthocystis aculeata and Coleosporium senecionis . 29 



20. Protomitosis in Amceba mucicola, Amasba froschi, Euglena splendens, 



and Amoeba diplomitoHca 31 



21. Mesomitosis in Pelomyxa palustris, Urospora lagiMs, and Galactima 



succosa 33 



22. Conjugation in Schizosaccharomyces octosporus 34 



23. Nuclei in mycelium of Thamnidium elegans and Mucor circinelloides. 41 



24. Fragments of mycelia of molds with dividing nuclei 41 



25. Filaments of molds showing chondrium 42 



26. Nucleus of Mucor in various stages of division 43 



27. Metachromatic corpuscles in Dematium 44 



28. Metachromatic corpuscles in asci 44 



29. Metachromatic corpuscles in conidia . 45 



30. Metachromatic corpuscles in cell of perithecium of Pestularia' vesi- 



culosa . I 46 



31. Mucor, general . . . . 49 



32. Mucor, zygospore. ... ... . . 50 



33. PenicUUum expansum ... -51 



34. Aspergillus glaucus -54 



35. Aspergillus fumigatus, A. nidulans . .... 54 



36. Cladosporium herbarum -55 



37. Spores of Alternaria -55 



38. Fusarium 55 



39. Oidium lactis.^ ... 56 



40: MoniUa Candida - . . 57 



41. Yeast cell ... 60 



xxi 



