342 Wager. — On Cy si opus Candidas, Ldv. 
is still more or less granular, but the nuclei are not so clearly visible in it ; they are 
probably in process of degeneration. 
Fig. 24. Portion of section of an oogonium showing the oospore with two 
nuclei. Each nucleus possesses a distinct network and a small nucleolus. The 
protoplasm is losing its characteristic foam-structure and is becoming more irregu- 
larly vacuolate. Some of the vacuoles indicate oil-spaces. 
Fig. 25. Portion of an oogonium with contained oospore, showing two nuclei 
just after division. This oospore contained four nuclei, produced by the division of 
two nuclei similar to those in Fig. 24. The columnar layer of the exospore is 
more highly developed. Spaces in which oil was contained are shown. 
Fig. 26. Oospore with four nuclei. The endospore is just beginning to form, 
as a thin layer just inside the innermost layer of the exospore. The columnar 
layer has apparently been completed and the third is now being formed. The 
whole or nearly the whole of the periplasm has been thrown down upon the wall 
of the spore in the form of a dense homogeneous irregular layer, only here and 
there is to be seen any connexion with the wall of the oogonium. 
Fig. 27. Ripe oospore in section, showing seven nuclei in the parietal layer of 
protoplasm. The section is taken from an oospore containing thirty-two nuclei. 
Each nucleus with its protoplasm may be regarded as a mother cell of four 
zoospores. The central space shown is filled, in the fresh oospore, with oil. The 
endospore is very thick. The fertilizing tube of the antheridium is also shown 
surrounded by an exospore. 
Fig. 28. Five stages in the division of the nuclei of the oogonium. Four and 
five show the spindle-figure. It will be seen that the nuclear membrane persists at 
least until the formation of the equatorial plate and probably later. 
