Cytology and Movements of the Cyanophycee. 265 
tents were much more fluid and homogeneous than those 
of the corresponding alge not thus symbiotically related. 
Palla (60) also spoke of the absence of cyanophycin gran- 
ules in the gonidia of lichens. 
Warming (80) found a cell nucleus, and said that the 
coloring matter permeated the whole of the protoplasm 
except the nucleus, but in a few forms (Glaucocystis, Phrag- 
monema) slightly developed chromatophores were present. 
Cilia were wanting, but the filaments were sometimes self- 
motile. 
Chodat and Malinesco (14) distinguished only one kind 
of granule in Cylindrospermum and Tolypothrix, but such 
granules were more abundant in the younger cells. They 
said : “In the young cells they are differentiated in their pro- 
toplasm. In the adult cells the maximum development is 
reached. In the older filaments and those surrounded by a 
thick wall they diminish greatly in number.” Chodat (11) 
in working on Chroococcus turgidus, concluded that the 
central body arose from the vacuole or emulsion-like appear- 
ance of the central part of the protoplasm, because the foun- 
dation substance of the central bodies usually stained like the 
peripheral protoplasm. It also had the same coloring matter 
and could not be easily distinguished from a chromatophore. 
He did not distinguish between slime balls, soluble starch, 
and cyanophycin, which he found distributed either uni- 
formly or only in the central body. He also found glyco- 
gen. In division the separating wall was protoplasmic and 
stained the same as the other protoplasm. It could not be 
distinguished from that substance until later, when it be- 
came a true cell wall. He therefore questioned strongly 
the existence of a colorless central body and a colored crust 
layer. Later Chodat (12) was able to stain the cyanophy- 
cin granules and the central body a ruby color by means of 
methylene blue, while still later, in a note published jointly 
with Goldflus (13) they described “pseudo spores” in the 
Cyanophycez, which were “completely stuffed with cyano- 
phycin.” 
