150 BOTANICAL GAZETTE [ SEPTEMBER 
many there are it is impossible to say at present. These projec- 
tions rapidly increase, and on account of their growth outward 
the meshes become decidedly elongated. By the time they have 
reached their full growth, the whole outer portions of the cones 
are composed of long distinct fibers converging to the apices, 
and it is only at the base that the meshes of the original welt can 
be distinguished. The apices of the cones taper out inte 
remarkably sharp points, but in no case was there a body 
observed at these points which might be considered as a col 
trolling center. 
_During the entire process of the formation of the cones the 
nuclear membrane remains intact. It is only after they have 
reached their full development that it begins to break dows. 
The breaking down of the membrane is shown in figs. 6 and 7. 
It will be seen from these figures that this takes place on om 
side first, where the identity of the membrane becomes lost i 
the network at the base of the cones. It will also be observed 
from these figures that the nucleolus still persists. It remaifls 
quite conspicuous until all traces of the nuclear wall are me 
when it suddenly disappears. What eventually becomes of | 
was not observed. oe 
In my observations on Cobaea it was thought probable 
the linin of the nucleus took part in the formation of the ¢! , 
network from which the cones develop. Now in Sei 
where the kinoplasmic network and the cones are fully - > 
oped before the nuclear wall disappears, it becomes quite ee 
that the linin takes no essential part in the formation eS 
achromatic figure. ao 
Upon the disappearance of the nuclear membrane oa va 
of the cones soon adjust themselves to the space offered | 
nuclear Cavity, and in doing so come in direct contact, ik ite 
first time, with the chromosomes. These latter bodies aie : 
lacking in interest; but as the writer, in future work, h 
make a more detailed study of the chromatin in Gladic a 
other forms, his observations will not be recorded at a ; 
Soon after this stage a series was observed showing * — 
