1913] VYAMANOUCHI—ZANARDINIA 35 
Fic. 86.—Section near base of crowded loops in contact with membrane, 
showing 44 isolated cut sections of loops. 
1G. 87.—Nucleus emerging from synapsis: several pairs of chromatin 
loops already in form of chromosomes. 
1G. 88.—Majority of the two arms of each of these loops have developed 
paired arms of bivalent chromosomes. 
Fic. 89.—Diakinesis stage: 22 bivalent chromosomes present. 
Fic. 90.—Spindle with two poles just formed. 
Fic. 91.—Metaphase, with a centrosome-like body at each pole. 
Fic. 92.—Polar view of metaphase, showing 22 bivalent chromosomes at 
equatorial plate. 
1G. 93.—Polar view of metaphase, showing 22 bivalent chromosomes at 
equatorial plate; axis of mitotic figure at right angles to that of previous figure. 
PLATE IV 
Formation of zoosporangium (continued) 
As the stage advances, gradual increase of the thickening of the cell wal] 
at the tip of the zoosporangium is noticeable. 
Fic. 96.—Late anaphase. 
Fic. 97.—Anaphase further advanced. 
Fic. 98.—Telophase. 
Fic. 99.—Late telophase: two daughter nuclei in resting condition. 
Fic. 100.—Two daughter nuclei have grown quite large. 
Fic. 101.—Two nuclei simultaneously in metaphase of second division. 
Fic. 102.—Polar view of metaphase, showing 22 chromosomes. 
Fic. 103.—Anaphase. 
Fic. 106.—Zoosporangium or zoospore mother cell near maturity: plastids 
moving toward nuclei and surrounding them. 
1G. 107.—Later stage: plastids around nuclei; cytoplasm has become 
detached from the cell wall and cleavage furrows have appeared; general out- 
lines of individual zoospores established. 
Fic. 108.—Mature mother cell containing 4 young zoospores: blepha- 
roplasts and cilia not yet formed. 
