3 H 
MONTGOMERY. 
[Vol. XV. 
wander into the cytoplasm. Salamandra maculosa y larvae : 
the “ Urei ” has a single large nucleolus. Bnfo cinereus , larvae 
of several months : concludes “ dass die Keimflecke, wenn noch 
winzig klein, aus den Knotenpunkten des Spongioplasmas 
entstanden sind, und nachdem sie eine gewisse Grosse erreicht, 
die Form und Sonderung einer Amobe besitzen. Dieselben 
stellen sich jetzt dar wie hiillenlose, kleine Zellen, air. denen wir 
einen homogenen kornigen Korper, der feinzackig oder selbst 
in feine Strahlen ausgezogen ist, unterscheiden und im Innern 
einen lichten, kernahnlichen Fleck, in dem sich noch ein Kor- 
perchen abzeichnet”; numbers of such nucleoli may later fuse 
together, “ unter Vermittelung ihrer Zackenspitzen.” Rana 
esculenta: in the smallest ova there is only a single large 
nucleolus, with a vacuolar central portion and peripheral 
radiating strands ; in larger eggs there are a number of smaller 
nucleoli, each of which has the same structure as the primitive 
one ; Leydig believes that nucleoli wander out of the nucleus, 
since he found a granular mass on the outer surface of the 
latter. The ova of Sus scrofa , Myoxus nitela , and Talpa euro¬ 
pea contain each a single nucleolus. 
Lukjanow (’ 88 ) investigated the stomach mucosa of Salaman¬ 
dra. There are several, usually club-shaped nucleoli (“ Nucleoli 
claviformes”), the smaller, often funnel-shaped, end of which 
is in contact with the nuclear membrane. He concludes 
“dass die kolbenahnliche Form des Nucleolus . . . auf eine 
Vorbereitung zur Inhaltsentleerung hinweist. Der Kolben 
entleert seinen Inhalt etwa ebenso, wie die Becherzelle ihren 
Schleim entleert ” ; and he supports this conclusion with the 
observation that a mass is often found on the outer surface of 
the nuclear membrane which stains like the nucleolus. 
Nagel (’ 88 ) studied the human egg. The “ Primordial-Ei ” 
has a single nucleolus ; those which contain no nucleoli he 
believes do not develop further. In the ripe egg amoeboid 
motions were noticed in life (studied in liquor folliculi). 
Sanfelice (’ 88 ) terms the nucleolus of the spermatoblast 
“ nucleus,” and the nucleus, “cell.” What he calls the nucleus 
then divides karyokinetically (but that this process is a division 
of the nucleolus may be deduced from his figures 6 o and 62 ). 
