37° 
MONTGOMERY. 
[Vol. XV. 
associations de granules provenant de la desagregation de 
I’Element nucldinien ” ; and then follow the “ nucleoles ter- 
tiaires,” which differ from the nucleoli of the preceding two 
generations in that they do not come from degenerating gran¬ 
ules of preceding generations, but are detached from them in 
the form of spherules. Each nucleolus of each generation 
arises, increases in size, becomes more complex in structure, 
and then passes through a polymorphic “ figure de resolution ” ; 
the form of these figures varies according to the particular 
generation, and also according to particular ova. The greater 
part of the “ figure de resolution ” then disappears, except a few 
granules which serve as the starting point for the next genera¬ 
tion ; that portion of the substance which disappears serves as 
nourishment for the egg. So all the generations of the second¬ 
ary and tertiary nucleoli arise “a l’aide des produits de la 
resolution anterieure.” After each “ resolution ” new nucleoli 
arise, and the number of these generations is large, continuing 
through a length of three years. The number of primary 
nucleoli is usually from two to six ; of secondary, from 400 to 
500 ; of tertiary, from 500 to 1000 ; the number varying in 
different ova. Fusions of nucleoli are of normal occurrence : 
“cette attraction des masses nucleiniens rappelle a 1’esprit ce 
qui se passe au sein de Toeuf entre les noyaux de conjugaison.” 
In the radiation exerted by each nucleolus upon the surrounding 
caryoplasm “nous voyons ... la confirmation d’une th&se 
soutenue dans la ‘ Cytodierese/ a savoir : que c’est sous l’influ- 
ence du noyau que se forment les asters de division.” The 
chromatin filament does not reappear, but there is a “grand 
nombre de generations nucleolaires et filamenteuses qui naitront 
et disparaitront tour a tour, Tune apres l’autre, jusqu’a l’epoque 
des globules polaires.” The authors necessarily regard all the 
previous observations on the amphibian ovum as erroneous. 
General conclusions for all kinds of cells, based in part on 
previous observations : there may be distinguished “nucldoles 
plasmatiques,” “nucleoles nucldiniens,” and “nucleoles mixtes ” 
(“qui sont rare”). Plasmatic nucleoli consist of at least two 
substances, “ une plastine et une globuline digestible.” All 
nucleoli, “ lorsque leur formation est achevee . . . represented 
