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in its central partis round, long-elliptical, or sometimes very irregularly | 
shaped, much less dense in its consistence than the surrounding cytoplasm, !: 
and is provided with a large nucleolus. The cell has two attraction- 
spheres, each of which is found in the marginal part of the cell along 
its major axis and not close to the nucleus. These attruction-spheres are of 
considerable size and are recognizable even by means of low magnifying 
power (e. g. Zeiss BB+2). Each sphere consists of a spherical body and 

striae radiating from it; the body is much clearer in its marginal part than 
in its inner part, which represents the centrosome. Between the nucleus 
and the sphere and nearer the latter es a roundish body, compact in its nature and looking like a nucleolus.™ 
The figure was drawn under the magnification by Zeiss DD + 4 from the preparation made by fixing the 

materials by Flemming’s stronger solution, cutting by means of microtome, staining by Bohmer’s hematoxylin, 
and imbedding in Canada-balsam. The centrosomes are, however, observable even in diving cells under water, 
but this method of observation is not to be recommended, because the pollen-cells swell up in water and after a few | 
seconds no trace of the spheres, the nucleolus, and the nucleolus-like bodies remains at all. Treated with | 
Merkel’s liquid, the attraction-spheres are fixed instantaneously and we can observe not only their body but 
also their rays even without staining. Science College, Imperial University, okyG. 

(1) As to the nature of this nucleolus-like body, my views will be published at some future occasion. 
(2) The nucleolus, the nucleolus-like bodies, as well as the centrosomes are stuined dark yellowish brown. Though my preparations 
were made about ten months ago they remain perfectly good in colours ete, 

