Lewis . — The Life History of Griffithsia Borneticina. 689 
Fig. 8 r. Longitudinal section ; fusion nucleus present in auxiliary cell, x 500. 
Fig. 82. Surface view of young cystocarp showing withered carpogenic branch falling off as 
a whole, x 500. 
Fig. 83. Longitudinal section showing two fusion nuclei in auxiliary cell, x 500. 
Fig. 84. Longitudinal section showing auxiliary cell divided into two, the upper cell the 
placental cell, x 500. 
Fig. 85. Longitudinal section of cystocarp in which sporogenous lobes have been formed from 
placental cell, x 500. 
Fig. 86. Formation of sporogenous lobes from auxiliary as well as placental cell, x 500. 
Fig. 87. Fusion of cells in centre of cystocarp; central cell, placental cell, auxiliary, and first 
peripheral cell are shown taking part in the fusion, x 500. 
Fig. 88. Degenerating nuclei from the lower part of the placenta, x 3600. 
Fig. 89. Division of sporogenous lobe ; crescent-shaped cell is cut off on outside, x 500. 
PLATE LII (Figs. 90-128). 
Figs. 90-93. Sections of sporogenous lobes, showing mode of division, x 500. 
Fig. 94. Mitosis in sporogenous lobe, and division by constriction of cytoplasm, x 1200. 
Fig. 95. Surface view of cystocarp producing mature spores ; sporogenous lobes of various ages 
are shown, x 1 50. 
Fig. 96. Section of mature carpospore. x 700. 
Fig. 97. Spindle and polar view of equatorial plate from mitoses in sporogenous lobes, x 1800. 
Figs. 98, 99. Tetrasporic papillae pushing out through wall of vegetative mother-cell, x 850. 
Figs. 100, 101. Tetrasporic papillae cut off from mother-cell, x 850. 
Figs. 102-4. Division of primary tetrasporic cell. X 850. 
Fig. 105. Basal cell and tetraspore-mother-cell. x 850. 
Fig. 106. Second division of basal cell, x 850. 
Fig. 107. Basal cell with two tetraspore-mother-cells ; in one three definitive spore nuclei are 
visible, x 850. 
Fig. 108. Basal cell with three tetraspore-mother-cells. x 500. 
Fig. 109. Connexion of basal cell with tetraspore-mother-cell. x 3600. 
Fig. no. Division of mother-cell into spores; basal cell shows tubular process, x 500. 
Fig. hi. Mother-cell; nucleus shows 14 granules, x 850. 
Fig. 1 1 2. Chromatin granules fewer in number and irregular in outline; nuclear (chromidial) 
material is shown passing out into cytoplasm, x 850. 
Fig. 113. About same stage; chromatin granules show indications of tetrad grouping, x 850. 
Fig. 114. Nucleus of tetraspore-mother-cell in prophase; chromosomes scattered through 
nuclear cavity, x 1800. 
Fig. 1 15. Same stage, x 1800. 
Fig. 1 16. Longitudinal section of tetraspore-mother-cell; nucleus in metaphase. X 1800. 
Fig. 1 1 7. Metaphase, first mitosis, x 1800. 
Fig. 1 18. Prophase, first mitosis; chromosomes gathering in centre of nuclear cavity, x 1800. 
Fig. 1 1 9. Prophase; chromosomes seem to be grouped in pairs, x 1800. 
Fig. 120. Polar view of equatorial plate showing fourteen chromosomes, x 1800. 
Fig. 1 21. Anaphase, showing separation of two groups of chromosomes (from neighbouring 
sections), x 1800. 
Fig. 122. Telophase; nuclear cavity dividing into two. x 1200. 
Fig. 123. Two daughter-nuclei in mother-cell, x 1800. 
Fig. 124. Prophase, second mitosis, x 3600. 
Fig. 125. Longitudinal section, tetraspore-mother-cell, upper nucleus showing spindle at 
metaphase, lower showing polar view of equatorial plate with seven chromosomes, x 1800. 
Fig. 126. Telophase, second mitosis, x 1200. 
Fig. 127. Three definitive spore nuclei visible in mother-cell; into lowest food material is 
passing from basal cell, x 850. 
Fig. 128. Portion of wall of tetrasporangium showing beginning of cleavage, x 3600. 
