1899] THE COMPOUND OOSPHERE OF ALBUGO BLITI 151 
article by the same author in 1896 on Albugo candidus. Berlese 
in 1898 published an article on the entire group. It appears that 
most of the study of the histology of coenocytic fungi has been 
concerned with the Peronosporez, but even here the data are yet 
too scanty to admit of any wide generalizations. The improve- 
ments in technique during recent years should be held in mind, 
as much of the discrepancy between the earlier and later results 
may be thus explained. 
Wager’s work (796) should be consulted for a comprehensive 
summary of the knowledge up to the time when he published the 
results of his investigations. For A/bugo candidus his own research 
shows a condition where the antheridial tube liberates one sperm 
nucleus which fuses with the solitary female nucleus in the 
Soplasm. He employed corrosive sublimate in saturated aqueous 
solution as a fixing agent, and stained the sections with Hartog’s 
mgrosin-carmine. In his earlier work on Peronospora Wager 
describes a multinucleate oogonium and antheridium. The nuclei 
. “ maturing oogonium pass to the periphery, where they 
divide mitotically. Two or three then return to the center and 
Probably fuse, as only one nucleus is found there at a later stage. 
The antheridial nuclei divide simultaneously with those of the 
®ogonium. The antheridi 
th al tube contains one or more nuclei, 
© antheridium finall 
stage. Thi aed having many less than it had at an earlier 
“eae “ soe was fixed by either absolute alcohol or 
mic acid, and stained with Kleinenberg’s haematoxylin. 
ogy Sives four figures to illustrate the development and 
=: cathe - Por tulace, but his description of the nuclear 
Albugo se ‘on 1s not illustrated. All statements concerning 
tj m to have been based on either this species or herba- 
of ai of other species. He studied also four species 
alcoho]. re Fora killing agent he used either 95 per cent. 
’ alcoholic corrosive sublimate, Flemming’s solution, or 
: ined with F lemming’s triple stain or Hartog’s 
armine, Further reference will be made to these arti- 
In the ape 
a ' p r. 
Csults Presented in this paper were obtained mainly 
