258 Phillips on a Comparative Study of the 
(102) reaffirmed a part of the above observations, but modi- 
fied his view concerning the distinction betwéen the central 
cytoplasm and the chromatophore. He now considered that 
there were two forms of granules, the cyanophycin granules 
of Hieronymus, and the slime balls of Palla, the former 
being connected with the central body by means of threads 
in their earlier stages. At certain times, quite simultane- 
ously, the cyanophycin granules would lose their cyanophy- 
cin, and become slime balls and vice versa. When the cyano- 
phycin was extruded into the cell, it might crystallize in the 
cytoplasm or it might disappear. These granules had a 
particular protoplasmic framework and were organs of the 
cell. The slime balls could flow together to form a central 
mass, which became the “‘central substance” of other authors 
(Hieronymus and Zacharias). This central substance 
might become rounded off, with a drop of cyanophycin in its 
centre, when it resembled a cell nucleus. The central sub- 
stance might break up in two ways: either by formation of 
a large number of fine granules suspended in chains which 
finally separated and became slime balls by growth, or the 
central body might divide into 2, 4, 8, etc., bodies which 
became the slime balls. These, finally, might take up cyano- 
phycin and become cyanophycin granules. This explained 
why slime balls and central substance, or slime balls and 
cyanophycin granules were seldom seen together in the same 
cell. Inthe same year (1894) Zukal published the results of 
another investigation (101) in which he held that the chro- 
matophore had a webbed or fibrillar structure. He 
reaffirmed the general points of his former observations, but 
augmented them. He now found that the youngest cells 
were colorless and had no webbed chromatophore, which 
was a later development. It segmented out of the cyto- 
plasm, dividing the cell into smaller portions or units. The 
granules were formed by certain points in the fibrils which 
gradually enlarged until they became granules similar to 
the “‘red granules’ of Butschli. These granules represented 
