Igo1 | GAMETOGENESIS AND FERTILIZATION IN ALBUGO 169 
Verworn (1897, pp. 74-78), Pfeffer (1897, pp. 49-51). It is 
unnecessary to quote these authors or repeat familiar discussion 
here, further than to state that they agree in general with the 
statement of Pfeffer (1897, p. 51), ‘“‘Auch derartige Erwag- 
ungen zwingen dazu, zunachst den veilkernigen Protoplasten als 
eine morphologische und physiologische Einheit anzusehen.”’ 
There is but little in common between the coenogamete, 
which is a structure of high physiological efficiency, and such 
structures as have been described by Golenkin (1900) and 
Klebahn (1899) in Sphaeroplea, which, as Klebahn remarks, 
resemble cases of polyspermy. They seem to indicate a patho- 
logical rather than a normal condition. 
The strict maintenance of the individuality of the nuclei and 
their characteristic behavior in fertilization adds another strong 
argument to the evidence, which is becoming cumulatively great, 
that these structures are the bearers of hereditary characters. 
The apparent. ease with which one nucleus can usurp the cyto- 
plasm of many is an argument against the energid theory of 
Sachs. 
[ Zo be concluded.) 
BoTANICAL INSTITUTE, BONN. 
