XXV111 LIST OF ILLUSTRATIONS 



FIG. PAGE. 



49. One resting and one dividing lymphocyte. In the latter the 



chromosomes are beginning to divide. The centrosomes appear 



as dots of chromatin 197 



50. Polar aspect. The belt of chromatin granules is dividing into 



chromosomes 199 



51. Polar aspect. The chromosomes are becoming semicircular . . 199 



52. Polar aspect. An "aster" stage of mitosis in a lymphocyte . . 201 



53. Polar aspect. Some of the chromosomes are semicircular-shaped; 



some are dots of chromatin 201* 



54. Polar aspect. One centrosome can be seen at the pole of the 



"aster" figure 203 



55. Polar aspect. Sixteen chromosomes could be counted in this cell . 203 



56. Profile aspect, of mitosis in a lymphocyte 205 



57. Profile aspect of mitosis in a lymphocyte 205 



58. Profile aspect. The chromosomes can be seen at the waist of the 



spindle 207 



59. Profile aspect. A figure frequently seen 207 



0. Profile aspect of mitosis 209 



61. Oblique aspect of mitosis in a lymphocyte 209 



62. Polar aspect of mitosis in a large lymphocyte from a patient 



suffering from carcinoma. There are sixteen chromosomes . . 211 



63. Polar aspect. The chromosomes were V-shaped with their apices 



inward to be attached to the nucleus-spindle, which can dimly 



be made out 211 



64. Polar aspect of mitosis in a large lymphocyte from a cancer 



patient. The chromosomes are dividing 213 



65. Profile aspect of mitosis 213 



66. Profile aspect. The figure is fully formed. One nucleolus-ceiitro- 



some is ring-shaped; the other is a dot of chromatin 215 



67. Profile aspect. The sixteen chromosomes could be counted . . 215 



68. The cell has become constricted in its centre 217 



69. Profile aspect. Complete division is about to occur. The chro- 



mosomes are being reconverted into granules, but the mitotic 

 figure is not quite finished at the dividing-point 217 



70. Profile aspect. The spindle and chromosomes have divided, but 



the cell-wall has not yet separated 219 



71. Completion of mitosis in a lymphocyte 219 



72. Asymmetrical mitosis in a lymphocyte induced by azur stain aug- 



mented by atropine 233 



73. Asymmetrical mitosis induced by azur stain augmented by 



atropine 233 



74. An early stage of delayed mitosis induced by a jelly with a low 



index of diffusion. The number of chromosomes is more than 

 sixteen 241 



75. Thirty-two chromosomes could be counted in this cell. Early 



mitosis delayed 241 



