MITOSIS IN (EDOGONIUMi 
ALBERT H. TUTTLF 
Professor of Biology, University of Virginia 
EIGHTEEN FIGURES 
A great deal has been written about cell division in CEdogonium. 
By far the larger portion of the literature, however, deals almost 
exclusivel}' with the interesting and unique processes involving 
the cell wall ; while the nuclear phenomena appear to have received 
but little attention, only three investigators having recorded and 
figured noteworthy observations upon nuclear division. 
The first of these was Strasburger ('80), who gave a brief 
account of the division of the nucleus as investigated by him 
with the aid of the technique in vogue in the earlier days of cytol- 
ogy. The object of the masterly work cited was, as is well known, 
to point out the fundamental unity which underlies the process 
of indirect nuclear division throughout the organic world, inter- 
preting this process in the light of that which had been previously 
observed in the tissues of the higher plants and animals; in con- 
sequence, stress was chiefly laid, in the case of QEdogonium and 
other lower forms, upon features similar to those already familiar 
to students of the higher forms. 
The second writer upon the subject was Klebahn ('92). His 
account was much briefer and consisted largely of a review of 
the work of Strasburger and the statement of several differences 
in detail; followed by an effort to find in the division of the nucleus 
of some cells of the filament something analogous to a reduction 
or '^maturation" division. 
The third and last communication is a long and important 
paper by Van Wisselingh ('08), devoted entirely to an account of 
^Contribution from the Biological Laboratorj', University of Virginia. 
