208 MONOGRAPH OF CHAETOMIUM AND ASCOTRICHA 
and no type material is at hand for examination. Since the 
present writer cannot speak with certainty regarding these. it 
has seemed best to list them as doubtful species. 
In 1834 Schweinitz (91) described Ch. Douglas as a very 
remarkable fungus allied to Sphaeria comata. In the herbarium 
of Curtis, now at Harvard University, there is a reference to this 
species and a very simple figure of it, but no specimen. Sac- 
cardo, in the Sylloge (p. 229), has listed this as a doubtful form. 
From a study of the very general description it seems possible 
that this may be identical with Ch. globosum of Kunze. 
Ch. lanatum, which was described by Quelét (70) in 1876 and 
to which reference has already been made, may possibly be 
identical with Ch. globosum Kze. Quelét’s description is of а 
very general nature, but his figures though simple show sinuous 
hairs like those of Ch. globosum, and spores similar in shape to 
those of the same species. 
Little is known of the form which Spegazzini (94) found on 
dog dung in Italy, and which he described in 1878 as Ch. ster- 
coreum. Іп the following year Saccardo (74) figured this and in 
1894 Cavara reported it, but without further comment. 
In 1881 Spegazzini (95) contributed a new form under the 
name Ch. microsporum. While no type specimens of this species 
are at hand it would seem that it might be identical with. Ch. 
globosum Kze., with the exception that the spores, which measure 
5-6.5 X 4-5 и, are smaller than in Kunze's species. 
It is impossible to determine from Karsten's (48) description, 
even though reasonably complete, the exact nature of the species 
which he described in 1888 under the name Ch. humanum, and 
so far as can be learned no author has since found or identified it. 
The writer has little knowledge of the form which Starbáck 
(97) described in 1889 as Ch. discolor, and no specimens of the 
original material are at hand. It would seem, however, from 
a study of the description and diagrammatic figures, that with the 
exception of the smaller size of the spores the plant in question 
might be Ch. globosum Kze. 
The original description and two general figures of Ch. varium 
described by Delacroix (25) in 1897 recall the characteristics of 1 
Ch. globosum Kze., but on the other hand figure 4 represents Ше | | 
