498 BOTANICAL GAZETTE [December 



Fig. 107. — Metaphase: thickening of cell wall is present, though the 

 elongation of the sporeling has not yet begun. 



■ 



Fig. 108. — Fusion nucleus in very early prophase: characteristic elonga- 

 tion of the sporeling and thickening of the corresponding cell wall at that part 

 is remarkable. 



Fig. 109. — Portion of the elongated part of a sporeling with a resting 



nucleus. 



Fig. iio. — Cross-section of the elongated portion of a sporeling at the 

 same stage as the previous figure; fusion nucleus in prophase; 48 chromosomes 



are present. 



Fig. hi, a, b. — Two sections of a sporeling: nucleus in prophase, showing 

 48 chromosomes; elongation and correponding thickening of the cell wall are 



evident. 



Fig. 112. — Metaphase: Elongation of the sporeling and thickening of the 

 cell wall at the point of the elongation are marked; axis of the figure is in the 

 direction of the elongation. 



Fig. 113. — Cross-section of a sporeling perpendicular to the axis of elonga- 

 tion; nucleus in late metaphase. 



Fig. 114. — Cross-section of a sporeling at about same stage as in fig. 112; 

 nucleus in metaphase is seen from the pole; 48 chromosomes are present. 



Fig. 115. — Sporeling in 2-celled stage: two nuclei in resting condition. 



Fig. 116. — Sporeling in 2-celled stage: nucleus in terminal cell in prophase, 

 and that of basal cell in resting condition. 



Fig. 117. — Sporeling in 2-celled stage: nucleus in terminal cell very small 

 and in resting condition, while that of basal cell shows very early prophase. 



Fig. 118. — Cross-section through a basal cell of a sporeling in 2-celled 

 stage: nucleus is in late prophase; 48 chromosomes present. 



Fig. 119. — Sporeling in 2-celled stage: nucleus in terminal cell in early 

 prophase, and that of basal cell in resting condition. 



Fig. 120. — Sporeling in 2-celled stage: nucleus in terminal cell in prophase, 

 showing 48 chromosomes. 



Fig. 121. — Sporeling in 3-celled stage: nucleus in basal cell in prophase, 

 showing 48 chromosomes. 



Fig. 122.— Sporeling in 3-celled stage: nucleus in basal cell in metaphase^ 

 Fig. 123. — Sporeling in 3-celled stage: all the nuclei in prophase, showing 

 48 chromosomes. 



PLATE XXX 



The germination of the unfertilized female gamete 



Fig. 124. — A female gamete in the resting condition: cell wall does not 



seem to be developed excepting at the point where a slight elongation is 

 noticeable. 



Fig. 125. — Cell wall is now recognizable, especially at the elongated point; 

 nucleus in resting condition. 



Fig* 126. — Nucleus with 24 chromosomes is prophase. 



