6 PAULINE H. DEDERER 
conspicuous projection on the surface of the egg (fig. 33). There 
is apparently no first telophase, for no loss of contour or massing 
of the chromosomes was observed between the late anaphase 
and the second metaphase. 
c. The second maturation division 
In the second division two spindles appear, as shown in figure 
34. Upon one are arranged the chromosomes of the first polar 
body; on the other, those of the second polar division. The 
old spindle fibers have disappeared, and the cell plate has as- 
sumed the form of irregular deep-staining masses. At a cor- 
responding stage in the oogenesis of Bombyx mori, Henking 
(92) figured a cell plate in a similar position, but it differed 
from this in being a single disc-shaped body or ‘thelyid’, which 
stained very faintly. The later constriction of the first polar 
body in P. cynthia, as in Bombyx, does not involve the cell 
plate but passes between it and the outer group of chromosomes. 
In figure 15 A, B, drawn from adjacent sections, are shown 
13 approximately equal chromosomes, arranged upon the two 
spindles, preparatory to a second division. It will be observed 
that the groups in the egg B and the first polar body A are at 
this time similar in the form and size of the chromosomes. The 
remnants of the cell plate are composed of deep-staining bodies, 
so large and definite as to give the appearance of chromosomes, 
but they are very irregular in form, and vary in size from large 
masses to very small granules. Figure 16 is another view of a 
similar stage. In figure 17, a polar view from three succceding 
sections, the cell plate is composed of 15 large bodies, and numer- 
ous granules. One chromosome is missing from the egg group, B. 
For various reasons second anaphase stages were extremely 
difficult to find. A few cases, however, were obtained, which 
seem fairly clear. In figure 19 is shown a spindle in which 
13 chromosomes are seen at one pole, 11 at the other. Thig 
latter group, which is incomplete, enters the second polar body. 
The 13 chromosomes of the egg nucleus are very small rounded 
bodies nearly equal in size. There is nothing to indicate a pe- 
