Cytology and Movements of the Cyanophycee. 251 
their identity with the cyanophycin granules or “schleim- 
kugeln” of other authors, and with Nadson considered them 
to consist of chromatin. This view was further strength- 
ened when later (9) he found these granules in the cyto- 
plasm of other organisms as Diatoms, Flagellates, etc., 
where they have an undoubted chromatin nature. He also 
demonstrated the “schleimkugeln” of Schmitz in great 
abundance along the partition walls of Oscillaria. They 
were stained by eosin, but were not affected by hematoxylin. 
In this respect he contradicted Zacharias (g1) who was able 
to demonstrate them only by the use of hematoxylin. If 
Oscillaria was subjected to artificial gastric digestion, the 
peripheral layer was dissolved out completely or nearly so, 
but the “central body” remained and appeared more like a 
nucleus than ever, retaining its power of staining with 
hematoxylin. Micro-chemically, he found the “schleim- 
kugeln” to contain much iron, and glycogen seemed to be 
the form of the reserve food. From these observations, 
Butschli based a strong argument for the nuclear character 
of the “central body,” which he held to divide by direct 
division. 
In the following year Fischer (26) attacked this view, 
claiming that Butschli’s methods of fixation were faulty and 
caused plasmolysis, thus forming an artifact in the cell which 
was mistaken for a definite peripheral layer or chromato- 
phore. Fischer’s observations were based upon the study 
of an unspecified species of Oscillaria and of Bacteria. In 
these, by methods similar to those used by Biitschli, he got 
a plasmolysis which left strands of protoplasm attached to 
the cell wall and such, he thought, Biitschli, had mistaken 
for a web structure in the so-called chromatophore. He did 
not consider the “central body” as described by Biitschli to 
be nuclear in its affinities, but rather that it was the main 
mass of the shrunken protoplast. He affirmed that a nucleus 
was present, but that it was to be looked for within the cen- 
tral mass of the protoplasm which Biitschli termed the “‘cen- 
