Nuclear Division in the Hepatic ae. 523 
Figs. 50-53. Lophocolea bidentata. 
Stages in the division of the spore-mother-cell. 
Figs. 54, 55. Lophocolea ciliolata. 
Fig* 55 shows the second division in the lower nucleus, and it is clearly of a 
heterotype character. 
Figs. 56-58. Plagiochasma. 
Fig. 56. Late stage in first division. 
Fig. 57. The second division (the two lateral nuclei lie in deeper focus's, 
diagrammatic. 
Fig. 58. The manner of appearance of the cell-walls. 
Figs. 59 - 75 . Fegatella conica. 
Fig. 59. Spore-mother-cell, with dense deeply-staining cytoplasm and nucleus 
with linin net-work. 
Pigs. 60, 61. Two views of the division of the daughter-nuclei. 
Figs. 62-64. Different views of the spore-mother-cell after the division of the 
nucleus. 
Fig. 65. Diagrammatic representation of the arrangement of the cell-walls 
(see Fig. 63). 
Figs. 66-75. Germination of the spores. 
Fig. 66. Nucleus with reticulum of linin, and two vacuolated nucleoli. 
Fig. 67. The chromosomes have formed, two centrospheres are shown. 
Fig. 68. Polar view at stage of the fission of the eight chromosomes. 
Fig. 69. Profile view at a little later period. 
Fig. 70. The same a little younger, the chromosomes just splitting. 
Fig. 71. The daughter-chromosomes are retreating to the two poles. 
Fig. 72. The daughter-nuclei forming. The cell-plate and spindle shown. 
Some of the spindle-fibres terminate in granular bodies. 
Fig. 73. A later stage, the nuclear walls and nucleoli have appeared, the linin 
has lost its staining capacity. 
Fig. 74. The first division of the spore completed, the daughter-nuclei are in a 
state of complete rest. 
