98 BOTANICAL GAZETTE [AUGUST 
14. Supernumerary male nuclei disorganize as do the super- 
numerary female nuclei. 
15. The fusion nucleus undergoes repeated mitoses, and the 
winter oospore is consequently multinucleate. 
16. The coenocentrum is very highly developed. It pos- 
sesses an attraction for the primary oospheric nuclei and serves 
as a source of nourishment for the surviving female nucleus. 
Albugo candida. 
17. The oosphere is developed in a manner quite different 
from that seen in A. Blitt, A. Portulacae, and A. Tragopogonis. 
The periplasm and ooplasm are not differentiated until the second 
mitosis is completed. The nuclei, excepting one, eventually 
pass to the periplasm, which is then cut off by a wall. 
18. One nucleus remains in the oosphere attached to the 
coenocentrum. 
19. The coenocentrum attracts the nuclei very strongly, and 
later serves as a source of nourishment for the surviving female 
nucleus. 
20. The antheridial tube occasionally contains two nuclei. 
[ Zo be continued. | 
BOTANICAL INSTITUTE, BONN. 
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