MONOGRAPH OF CHAETOMIUM AND ASCOTRICHA 197 
identified with them as Zopf had listed them in his monograph. 
The larger size of the spores, however, seems an insufficient reason 
for setting apart this variety, for in Ch. Kunzeanum Zopf, the 
spores are found to vary in size from 9и to 13и in length and 
from 8и to 9.5 и in width. 
An examination has been made of mounts from original 
material which was described in 1892 by Ellis as Ch. olivaceum 
C. & E., var. chartarum, and which had already been listed and 
distributed without description by Roumeguére, in Rev. Myc. 
II: 130 and Fung. Gall. No. 4930, in 1889, as f. chartarum. The 
spores have been measured and found rather to correspond with 
the somewhat variable spores of Ch. globosum Kze. As to the 
fact that the color varied from nearly black to mouse color and 
even to greenish-yellow, it may be said that such variations may 
easily be found in one and the same culture, and may be attributed 
to a difference in age. It hardly seems advisable to set plants 
with such a variable and uncertain characteristic apart from the 
type species. 
During the same year Beauverie published an account of his 
work with cultures of the conidial form which Saccardo (77) 
called Oospora crustacea. In the month of June Beauverie found 
perithecia in tube cultures of potato which dated from January, 
and which were very tightly closed with cotton and covered with 
caoutchouc, so that no communication between the media and 
the outside air was possible. The white carpet of conidial vege- 
tation was found to be spotted with small dark green bodies 
which were recognized as Chaetomium, and to which the name 
Ch. oospora was given. At two different times the writer has 
found conditions similar to those to which Beauverie has called 
attention in connection with his work. Cultures which were 
supposed to have been pure and had apparently remained uncon- 
taminated for a considerable period showed in both cases ES 
organization of perithecia which have finally developed into 
plants typical of Ch. globosum. While the writer has never 
examined type material of Beauverie's form, he is led to believe 
from his own experience and from Beauverie's description, that 
Ch. oospora is identical with the above named species of Kunze. 
While only the original description and figures of Ch. Еазисае 
