SPH ZROPLEA. 83 
After fusion of the sexual nuclei the odspore develops its character- 
istic wall (Fig. 29, G, H). Unfortunately Klebahn was unable to 
trace the fate of the remaining nuclei. Whether they disappear indi- 
vidually or, after fusion with each other, unite with the fusion nucleus, 
is a matter of conjecture only, The investigations of Golenken (1900) 
FiG, 29.—Fecundation of eggs and later development of spermatozoids, A-H, Spheroplea brauntt. 
I-M, S. crassisepta.—(After Klebahn.) 
A, egg with 3 nuclei, into which a sperm has just penetrated. 
B, same stage as A; egg with 5 nuclei, 
C, egg with 4 nuclei and 5 pyrenoids; the sperm nucleus has penetrated farther into egg 
D, sperm nucleus applied to functional nucleus of egg. 
E, fusion of two sexual nuclei, 
F-H, maturation of odspore. 
I-K, later stages in develop t of sper 
L, two spermatozoids, 
M, part of an odgonium showing fecundated eggs and spermatozoids within, 
seem to throw further light upon the subject. As reported in the 
Botanisches Centralblatt, 84, p. 284, 1900, this author, who observed 
the sexual process in a variety of SDheroplea annulina, which con- 
tained multinucleate as well as uninucleate eggs, finds that in the 
multinucleate eggs the nuclei lie near each other close to the surface, 
and at a spot where the spermatozoids seem to enter. After fecunda- 
tion the nuclei first distribute themselves regularly within the egg and 
then finally fuse to form one nucleus. 
