1899] THE COMPOUND OOSPHERE OF ALBUGO BLITI 165 
detail. Preparatory to the formation of the spindle the nucleus 
elongates, its membrane being pulled out in two directions, while 
the chromatin collects in minute globules in the linin thread. 
These are at first irregular in size, but gradually become less 
ftumerous and more uniform, presumably fusing with one another 
until a small number of nearly spherical bodies, the chromosomes, 
are present in the nucleus. /%g. g shows a condition with the 
chromatin granules and the linin network still evident, while in 
fig. § the linin strands have almost disappeared. As the chromo- 
somes perfect their organization they approach the equator of 
the now elongated nucleus (fig. 6), and there appear at the 
poles two round bodies which lie within the nuclear membrane, 
These bodies stain red with Flemming’s triple stain and are 
Constantly present at this period of the prophase. Although 
not observed earlier they persist and become more prominent 
m the later stages. The spindle fibers first appear a. little 
later at the poles of the elongated nucleus, from whence they 
seem to grow toward the equator. They are entirely intra- 
— and there is a distinct space between them and the 
larly one (fig. 9). The chromosomes are at first irreg- 
achromat; sh throughout the equatorial region, but when the 
themselves een becomes more distinctly developed they group 
somes are i nuclear plate and divide. As fe chromo; 
determine on Spherical and very small it was impossible to 
Fests in a cl : oral ot their division. The mature spindle 
with the coma distinctly inside of the nuclear membrane, 
Must be # a odies very definitely outlined. That these bodies 
at certain & : pee eats is evident from their constancy 
anaphase P eg m the mitosis, e. g., from late prophase to late 
Auclear is intranuclear, it is not surprising that exttar 
tions Present ae pve be absent, and in fact the only radia- 
0 have been © the spindle fibers. These structures seem not 
Previously described for this group of fungi. 
a. show a condition very commonly seen. ee 
at the cente eS prominent, the chromosomes are masse 
",and the spindle fibers are very slightly or not at all 
igs, 
“clear 
