1899]- OOGENESIS IN PINUS 277 
phytes older than that represented in fig. 26. These show that 
the chromosomes do not resolve themselves into nucleoli, but 
pass into an ordinary reticulum. 
A peculiar monstrosity was noted in one preparation (jigs. 
27, 27a). Instead of the usual free cell formation, each division 
of the nucleus has been followed by the formation of a wall, so 
that a somewhat spherical embryo has been formed near the cen- 
ter of the oosphere, about which no trace of a pollen tube could 
be found, 
ARCHOPLASM AND CENTROSOMES. i 
After the large spindle concerned in the separation of the 
ventral canal cell from the oosphere has broken up, portions of 
it become scattered throughout the oosphere (figs. §, 19a). 
One of these fragments (zga, s.) is shown in detail in fig. 32. 
Some of these fragments (fig. 37, 5) in their later stages show a 
perlect transition from kinoplasmic fibers to the ordinary reticular 
oe OF the oosphere. Such cases, together with those like 
fg. 22, make it probable that the kinoplasmic fibers do not arise 
ch any specific kinoplasmic or archoplasmic substance but 
niet from a rearrangement of general reticulum, whether it be 
0988 the nucleus or inside, Such a view, while not popular 
mth botanists, has able supporters among zodlogists. 
i . not able positively to identify centroson= em! 
areas a8 this work, but in several preparations clearly de ne 
b tesembling the archoplasmic regions in Ascaris were 
il near the male nuclei in the pollen tube (fig. 7. 3) a 
absent :. find centrosomes has not convinced me that they 
Tom the male nuclei. | 
i Ne archoplasmic areas shown in fig. 12 — a 
the Sota although nearly a hundred nuclei in A : 
Nuc] Stage were examined. These areas, one insi 
ae and the other outside, are sharply differentiated and are 
eg to rather coarsethreads. This is not the usual eget 
all to do eae for this nucleus and may have nothing 
ith the spindle. 
