XXVI LIST OF ILLUSTBATIONS 



44. Spore-bearing yeast cells 63 



45. Saccharomyces cerevisia showing vacuoles and metachromatic corpuscles 



stained 64 



46. Saccharomyces cerevisia showing cells with nuclei, nuclear division and 



glycogenic vacuoles with grains 64 



47. Saccharomyces cerevisia showing cells stained by a special method re- 



vealing a chondrium consisting of granular- and rod-mitochondria. . . 64 



48. Saccharomyces ceremsia with both nucleus and metachromatic granules . 65 



49. Saccharomyces ellipsoideus cells with nucleus 66 



50. Copulation and sporulation in Schizosaccharomyces octosporus 68 



51. Various stages of nuclear division during sporulation in Schizosaccharo- 



myces octosporus 68 



52. Cellular fusion in Schizosaccharomyces pombe . 69 



53. Heterogamous copulation in Zygosaccharomyces chevalieri 70 



54. Sporulation in Saccharomyces ludwigii 71 



55. Germination of ascospores in Saccharomyces ludwigii 72 



56. Wine and beer yeasts . 74 



57. Wild and pseudo-yeasts 77 



58. Types of micrococci 79 



59. Types of bacilli 79 



60. Types of spirilla 80 



61. Involution forms 80 



62. The division of bacterial cells . v 83 



63. The formation of spores 85 



64. Location of spores in bacterial cells 85 



65. Spore germination 86 



66. Division forms of micrococci 87 



67. Division forms of bacilli. 88 



68. Threads of Bad. anthracis 88 



69. Plasmolytic changes. 89 



70. Karyokinetic appearances in Bad. gammari 91 



71. B. megatherium in process of division 92 



72. Diffuse nucleus in Chromatium okenii and Beggiatoa alba 93 



73. B. butschlii in division 95 



74. B. sporonema in spore formation with vestiges of ancestral sexuality . . 96 



75. B. radicosus with nuclear appearances 96 



76. B.flexilis in division of cell and formation of spores 98 



77. Retrogression of original nucleus and formation of diffuse nucleus in var- 



ious bacteria 98 



78. Life cycle of Azotobacter 100 



79. Differentiation of metachromatic corpuscles in various bacteria by means 



of stains 102 



80. Structure of bacterial membrane in section 103 



81. Capsules (Bad. pneumonia) 104 



82. Distribution of nuclear substance and various flagella 105 



83. Monotrichous bacteria (Msp. comma) 105 



84. Monotrichous bacteria (Ps. pyocyanea) 105 



85. Lophotrichous bacteria (Ps. syncyanea) 105 



86. Lophotrichous bacteria (Sp. rubrum) . 105 



87. Peritrichous bacteria (B. typhosus) 105 



88. Crenothrix polyspora 109 



89. Spirophyttumferrugineum.Gallionellaferruginea^Leptothrixochracea... . no 



90. Pasteur-Chamberland or Berkefeld filtering apparatus 120 



91. Amceba vespertilio 124 



92. Paramecium caudatum dividing without mitosis 127 



93. Stages in division of Amoeba poly podia 128 



94. Multiplication of Coccidium schubergi 129 



