| FIG. | PAGE | |
| 53. | Annular chromosomes of mole-cricket (Wilson, after vom Rath) | 181 |
| 54-56. | Diagrams illustrating a hypothetic field of force in caryokinesis (Prof. W. Peddie) | 182-4 |
| 57. | An artificial figure of caryokinesis (Ledue) | 186 |
| 58. | A segmented egg of Cerebratulus (Prenant, after Coe) | 189 |
| 59. | Diagram of a field of force with two like poles | 189 |
| 60. | A budding yeast-cell | 213 |
| 61. | The roulettes of the conic sections | 218 |
| 62. | Mode of development of an unduloid from a cylindrical tube | 220 |
| 63-65. | Cylindrical, unduloid, nodoid and catenoid oil-globules (Plateau) | 222, 3 |
| 66. | Diagram of the nodoid, or elastic curve | 224 |
| 67. | Diagram of a cylinder capped by the corresponding portion of a sphere | 226 |
| 68. | A liquid cylinder breaking up into spheres | 227 |
| 69. | The same phenomenon in a protoplasmic cell of Trianea | 234 |
| 70. | Some phases of a splash (A. M. Worthington) | 235 |
| 71. | A breaking wave (do.) | 236 |
| 72. | The calycles of some campanularian zoophytes | 237 |
| 73. | A flagellate monad, Distigma proteus (Saville Kent) | 246 |
| 74. | Noctiluca miliaris, diagrammatic | 246 |
| 75. | Various species of Vorticella (Saville Kent and others) | 247 |
| 76. | Various species of Salpingoeca (do.) | 248 |
| 77. | Species of Tintinnus, Dinobryon and Codonella (do.) | 248 |
| 78. | The tube or cup of Vaginicola | 248 |
| 79. | The same of Folliculina | 249 |
| 80. | Trachelophyllum (Wreszniowski) | 249 |
| 81. | Trichodina pediculus | 252 |
| 82. | Dinenympha gracilis (Leidy) | 253 |
| 83. | A "collar-cell" of Codosiga | 254 |
| 84. | Various species of Lagena (Brady) | 256 |
| 85. | Hanging drops, to illustrate the unduloid form (C. R. Darling) | 257 |
| 86. | Diagram of a fluted cylinder | 260 |
| 87. | Nodosaria scalaris (Brady) | 262 |
| 88. | Fluted and pleated gonangia of certain Campanularians (Allman) | 262 |
| 89. | Various species of Nodosaria, Sagrina and Rheophox (Brady) | 263 |
| 90. | Trypanosoma tineae and Spirochaeta anodontae, to shew undulating membranes (Minchin and Fantham) | 266 |
| 91. | Some species of Trichomastix and Trichomonax (Kofoid) | 267 |
| 92. | Herpetomonas assuming the undulatory membrane of a Trypanosome (D. L. Mackinnon) | 268 |
| 93. | Diagram of a human blood-corpuscle | 271 |
| 94. | Sperm-cells of decapod crustacea, Inachus and Galathca (Koltzuff) | 273 |
| 95. | The same, in saline solutions of varying density (do.) | 274 |
| 96. | A sperm-cell of Dromia (do.) | 275 |
| 97. | Chondriosomes in cells of kidney and pancreas (Barratt and Matthews) | 285 |
| 98. | Adsorptive concentration of potassium salts in various plant-cells (Macallum) | 290 |
| 99-101. | Equilibrium of surface-tension in a floating drop | 294, 5 |
| 102. | Plateau's "boureclot" in plant-cells: diagrammatic (Berthold) | 298 |
| 103. | Parenchyma of maize, shewing the same phenomenon | 298 |
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