20 Wisco?isin Academy of Sciences, Arts, and Letters. 
present. The chromatin is in the form of a heavy branching 
net-work composed of uniform threads. 
The blepharoplast lies close to the nuclear membrane but as 
a rule not in contact with it. It is a short, thick, more or less 
conical mass. In figure twenty-eight, a section is shown 
through the thick end of the blepharoplast. In figure twenty- 
nine is given a section through the same blepharoplast at its 
thinner, narrower end. Figure thirty shows a side view of 
another blepharoplast at the same stage. The nucleus is often 
indented just under the blepharoplast. 
As the metamorphosis progresses, a nuclear beak forms under 
the elongating blepharoplast. The beginning of this process is 
seen in figure thirty-one. The section cuts through the ble¬ 
pharoplast obliquely. There is a distinct angle in the contour 
of the nucleus, probably representing a ridge or projection 
under the anterior end of the blepharoplast. Nucleus and 
blepharoplast are not yet in contact. 
In a slightly later stage, the nuclear projection lies in/con¬ 
tact with the middle portion of the blepharoplast (figure 32). 
The nucleus at this stage is still in the center of the well- 
rounded cell. The anterior end of the blepharoplast forms a 
short beak (a) beyond the nucleus, then runs back for some 
distance in contact with it. The posterior third of the blepharo¬ 
plast is not at this stage in contact with the nuclear membrane. 
It extends out through the cytoplasm and its posterior tip is in 
contact with the plasma membrane. 
In figure thirty-three, we have a cross section of the ble¬ 
pharoplast at a slightly later stage. The section cuts through 
behind the nuclear projection, as may be seen from the fact 
that the nucleus and blepharoplast _^are not in contact. The 
condition of the chromatin has changed but little since the 
stage in figure twenty-eight. The network is perhaps more 
open. 
The blepharoplast and nucleus now push out forming a 
slender half coil, lying just below the plasma membrane. In 
this projection the blepharoplast extends somewhat farther for¬ 
ward than the nucleus. The larger part of the nucleus still 
forms a rounded mass as shown in figure thirty-four. Figures 
