38 
Olive, Mitotic division of tlie nuclei of the Cyanophyceae. 
are usually deeply imbedded in one side of tlie nuclear boclv 
(p. 34). 
I liave been unable to find any indication of oil or glycogen 
in Oscillatoria. 
15. Experiments witli peptic digestion resnlted in tlie con- 
clnsion tliat some of tlie cytoplasm itself is digested, as well as 
the cyanopliycin. Mncli of tlie protoplasmic contents, liowever, 
appears to remain unaffected, so tliat one may see clearly in 
digested sections tlie slirunken cliromatopliore and central body, 
togetlier witli tlie refractive granules of indigest-ible cfiromatin (p. 34). 
16. For tlie reasons tliat tbe miclei of tlie vegetative fila- 
ments sliow occasional indications of tlie formation of a membrane; 
and, tliat in spores and lieterocvsts, we find at least a beginning 
of tlie formation of tlie usual resting condition; and, finally, tliat 
tlie mitotic processes wliicli take place in-tliese plants are simi- 
lar to tliose of liiglier organisms, we are jiistified in tlie conclu- 
sion tliat tlie central body of tlie Ciyanophyceae is not essentially 
different from tlie nncleus of tlie liiglier plants. It may, liowev¬ 
er, be called a primitive nucletis from tlie fact tliat tlie clirom- 
osomes appear to be made np of a single cliromomere, and, 
secondly, becatise of tlie unusual simplicity of tlie spireme of 
Gloeocapsa. 
Madison, Wisconsin, U. S. A. 
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— — Y eitere Ansfiüirnngen über den Bau der Cyanopliyceen und Bakte¬ 
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— — Notiz über Teilungszustände des Zentralkörpers bei einer Nostocacee. 
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•) 
Deinega, V.: Der gegenwärtige Zustand unserer Kenntnisse über den Zell¬ 
inhalt der Pliycoehromaceen. (Bull, de la, Soc. des Natur, de Hos- 
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( Sitzungsberichte der k. säclis. Gesellsch. d. AViss. Math.-Phvs. Ivlasse. 
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