380 MONTGOMERY. [Vol. XV. 



homogene. lis se nourrissent ensuite dans le sue nucleaire, . . , 

 Les nucleoles peuvent etre consideres comme une substance 

 de reserve que se separe a un moment donne de la charpente 

 nucleaire pour etre reprise par elle ulterieurement " ; he assumes 

 that Strasburger's "corpuscule du secretion" is a true nucleolus. 

 " Dans le Lilimn et dans I'autres plantes, les noyaux filles 

 n'offrent pas de nucleole avant d'entrer en division ; en outre, 

 leur aspect general au debut du phenomene est bien different 

 de celui du noyau mere. ... Le fait qu'ils se s6parent du 

 filament des que le noyau . . . arrive a I'etat de repos, pour 

 etre repris par lui aux premiers stades de la division, permet 

 de les considerer, avec M. Strasburger, comme une sorte de 

 reserve." 



Macfarlane ('85) studied nuclear division in Chara fragilis 

 (fixation with osmic acid) : the nucleus of the apical cell contains 

 one nucleolus, in which lies an " endonucleolus " (a term here 

 substituted for his earlier term " nucleolo-nucleus "). At the 

 commencement of all cell divisions this part of the nucleolus 

 first divides, then the nucleolus, last of all the nucleus. After 

 this division of the apical cell a nodal and internodal cell 

 are produced, and the former " continues to divide regularly, 

 forming cells each with one nucleus and nucleolus. In the 

 internodal complete cell division is henceforward absolutely 

 arrested : but the earlier steps are taken ; for while the nodal 

 cell has divided into three or four, the nucleolus of the inter- 

 nodal has divided and redivided, so that four nucleoli are present 

 in the nucleus of it. The internodal cell then increases rapidly 

 in length, the four nucleoli meanwhile continuing to proliferate, 

 so that in internodal cells, such as in the third removed from 

 the apex, we soon get a large nucleus with many little dark 

 nucleoli. The nucleus then divides in the simple manner 

 figured by Johow, so that in the fourth internodal cell there 

 may be two nuclei, each with many nucleoli, in the fifth, three 

 or four nuclei, and so on, so that the internodal cells soon 

 become multinuclear, and their nuclei multinucleolar." The 

 cortical nodal cells do not divide further, but " their nucleoli 

 follow the example of that of the internode . . . the consequence 

 being that the cortical nodal, and soon after the cortical 



