1913] YAMANOUCHI—ZANARDINIA 7 
The nucleus passes into telophase, two new daughter nuclei are 
formed, and then the subsequent divisions occur. The details 
were followed from the second division to the last, and the pro- 
cesses are simply a repetition of the first. When the young game- 
tangium has reached the stage consisting of a single row of 7 or 
more cells, there occur also divisions perpendicular to the axis of 
the gametangia, so that each tier of the 
gametangium consists of 2 (fig. 6, 7), 4 (fig. 
6,7), or 8 cells (fig. 7, a). During these 
divisions the nuclei in the gametangium 
do not necessarily divide simultaneously, 
but often in quite irregular order (fig. 6, 
c-g). The size of the nuclei does not dimin- 
ish in spite of the gradual and considerable 
diminution in size of the cell (fig. 6, a7); for 
example, the figure in the first division in 
the gametangium (fig. 6, 2) and that of the 
last division (fig. 6, g,7) are alike in size, 
while the first cell is ten times as large as 
the last. 
During these mitoses in the gametangia, 
chromosomes were counted in prophase, in 
polar view of metaphase and anaphase, and 
the number is 22. 
Regularity in the axes of these divisions, 

: : Fic, 4——Mature game- 
which take place either parallel or perpen-  tangia: a, female gametan- 
dicular to one another, results in producing _ gium with 8 tiers of gamete 
: mother cells: 6, male game- 
the well known male gametangia of Zanar- ccatie HL se tee Of 
dinia, comprising more than 30 tiers, each gamete mother cells. 
tier made up of 8 cells (fig. 7, 6). Each 
individual cell in the gametangium is a male gamete mother cell, 
within which a single male gamete is formed. The mother cell 
contains a single large nucleus situated in the center, and usually 
two plastids whose position varies (fig. 7, a, 6). The nucleus 
passes into a complete resting condition. One of the plastids 
moves near the nucleus and then a part of the plastid body becomes 
deep orange in color, which is the red pigment (fig. 7, c). When 
