NUCLEAR DIVISION OF THE LARGE AMCEBA. 
281 
The chromatin granules then become grouped into 
masses on the equatorial plate of the spindle, which now 
makes its appearance within the nuclear membraue (Text- 
figs. 6,7). 
The later stages of this division have already been described 
in the preceding paper, but it may be pointed out that the 
reconstructed nuclei of forms which have recently divided are 
at first very small, and only later attain their usual dimensions. 
In conclusion, I should like to point out that at no stage in 
this division can I find any evidence for the existence of a 
centriol. 
Text-fig. 7. 
The chromatin granules have become grouped in masses on the 
spindle-fibres which have begun to make their appearance. 
In a recent paper by Nagler, “ Studien fiber Protozoen 
aus einern Almtfimpel,” in the ‘Archiv ffir Protistenkunde/ 
Bd. xxii, 1911, a dictum of Hartmann and Chagas is quoted 
with apparent approval (p. 65) “ Wie bereits in der Arbeit 
von Hartmann und Chagas (1910), dargetan ist ‘ Ivann das 
allgemeine Vorhandensein von Zentralorganen im Caryosotn 
aller Protozoon jetzt als eine Wohlbegriindete wissen- 
schaftliche Tatsache gelten.’ ” 
Personally I cannot help feeling that this sweeping 
generalisation, in common with most of the numerous gene- 
ralisations that have appeared upon the Protozoan nucleus 
during the last ten years is, to say the least of it, premature. 
