398 
MONTGOMERY. 
[VOL. XV. 
Kernkorperchens . . . spricht entschieden fur Strasburgers 
Annahme, dass es zur Bildung der Spindelfasern benutzt 
werde.” 
Harper (’97), ascus of Erysiphe: the nucleolus and the cen- 
trosphere stain in the same way, and “ die achromatischen 
Fasern, aus welchen diese intranuclearen Strahlenkegel gebildet 
werden, entstehen wahrscheinlich grosstentheils auf Kosten 
der Kernkorperchensubstanz, die zu dieser Zeit regelmassig 
verschwindet.” 
Huie (’97), cells of Drosera: the nucleoli (“ nucleolar chromo¬ 
somes”) are spherical and usually central; “endonucleoli” 
are enclosed spaces, not granules. During the process of food 
assimilation by the nucleus the nucleolus becomes smaller, and 
its vacuoles less apparent. 
Lidforss (’97) gives a thorough review of the “ Sichelstadium ” 
(Strasburger’s “ Sekretkorperchen ”) of the nucleolus in plant 
cells, as also the results of observations of his own on the 
embryo sac. Tulipa: at first there are several small nucleoli 
within the nuclear cavity, which later by their fusion produce 
a large one which becomes flattened against the nuclear mem¬ 
brane (the process is essentially the same in Fritillaria, Anthe- 
ricum , and Lilium). Gagea : the nucleolar changes are as in 
the preceding forms, except that when the nucleolus reaches 
the periphery it remains spherical; this is also the case in 
Ornithogalum. Oenothera: in the youngest cells there is one 
central nucleolus ; subsequently this flattens against the nuclear 
membrane, but finally wanders back to the center and becomes 
spherical. He concludes that in the angiosperms the sickle 
stage of the nucleolus is a normal phenomenon, as is also its 
excentric position. In male and female germ cells these meta¬ 
morphoses occur at corresponding stages, namely, when the 
reduction of the chromatin takes place ; “ indessen bleiben 
vorlaufig alle Speculationen iiber die Bedeutung des Sichel- 
stadiums von problematischen Werth. . . .” 
Mottier (’97), cells of Podophyllum and Lilium: in mitosis, 
at the time of disappearance of the nuclear membrane, the 
nucleolus breaks into fragments of various size. “ Bei der 
Anlage der vielpoligen Spindel nun treten im Cytoplasma 
