usr Be 
88 BOTANICAL GAZETTE [AUGUST 
and in this he is confirmed by GREGOIRE and ” ie i 
This vesicle, which he interprets as a H auischicht, reso = a p 
fibers and furnishes at least a part of the material for the _ a 
do not find such a vesicle separate and distinct from the ee 
‘membrane, but I find strong evidence that the nuclear — 
itself becomes resolved into fibers. This view is ie a 
with the generally accepted theory of the nature of a p ee 
brane, and the evidence is presented by such pa ~ 
shown in figs.12-14. In fig.12 we have a nucleus whic a 
plane shows a number of prominent lobes. A few fibers are a 
over one lobe, and at several other places the nuclear cavity 
ved 
apparently bounded by a weft of fibers. These are either a t 
from a layer of kinoplasm which closely invests the nucle 
from the nuclear membrane itself. The fact that the a 
membrane disappears as these fibers come into view would lend : p 
to the latter supposition. In jig. 1 3 fibers are shown over one a 
of a nucleus which is very much elongated, and in jig. 14 _ aa 
be seen at both ends of a similarly elongated nucleus. In the a : 
case the nuclear membrane persists in several places, a a 
merge gradually into the fibrillar condition. The fber a 
conform to the irregularities of the surface, giving strong indica 
that they are derived from the nuclear membrane. ee 
HarPer (10) has shown a close relation between membranes ae 
‘fibers in Erysiphe, where, in free spore formation in the ascus, thé 
fibers which mark out the boundary of the future spore fuse side 5 
brane. The nuclear membrane is gener : 
side to form a plasma mem 
ally believed to be of kinop 
achromatic spindle. Evide 
to the other may be ea 
Soon after the appe 
increased, but I have 
lasmic origin, and so are the fhe 
ntly then, the transition from t ae 
sily accomplished. 
