1899] THE COMPOUND OOSPHERE OF ALBUGO BLITI 153 
Similar appearances were noted by Istvanffi (’95) and Wager 
(96), and their explanation is undoubtedly the true one, namely, 
that the protoplasm was rapidly flowing from the mycelium to 
fll the enlarging oogonium. When sufficient nucleated proto- 
plasm has entered the developing oogonium, this structure is cut 
off from the hyphae by a septum at the point of enlargement 
(fig. 44). The oogonium is now fully differentiated from the 
vegetative hyphae, the nuclei recover their original form and lie 
ina coarsely vacuolate and somewhat granular cytoplasm. The 
general appearance of the oogonium and its contents may be 
seen in fig. 45. 
. The antheridium develops simultaneously with the oogo- 
uum, but gives no evidence of the flowing of the protoplasm 
— the growing structure. Probably owing to the small size of 
this organ there is but little disturbance as it fills with proto- 
plasm. It becomes cut off from the parent hypha and the con- 
tents are similar in appearance to those of the oogonium as is 
shown in Fig. 45. 
The most conspicuous feature in this early development of 
eae is the increase in the size of the nuclei. This 
Sama Somewhat rapidly just before the oogonium has 
ies full size. As the nuclei grow larger the linin net- 
©omes much more prominent, until finally it assumes a 
Ver sae 
es characteristic structure in the form of large meshes, the 
teads bein 
the 
eee of early mitosis. While the nuclei are pass- 
the oogonium wall thickens slightly. 
: that the number of nuclei may be deter- 
the ‘gags oe accurately. The count ranged from 226 
ce :.. number being quite exceptional. Making 
€ fact that several nuclei may readily have been 
Min 
1 333, 
allowan 
