209 MONOGRAPH OF CHAETOMIUM AND ASCOTRICHA 
An extremely common species having appeared in cultures of 
dung of many animals from nearly all parts of New England, 
Florida, Chili, Venezuela, and China (Chivers No. 21). Ке- 
ported also from many localities in middle western and western 
United States, and from England and Germany. Туре locality,— 
Berlin and Góttingen; on decaying animal and vegetable sub- 
stances (carcasses, potatoes, and rabbit dung). 
In 1888 Ellis and Everhart (31) gave the name Ch. caninum 
to material found on dog dung in Louisiana. Later, however, 
the same authors (32) listed this name аз a synonym under Ch. 
bostrychodes Zopf. 
Ch. bostrychodes has proved to be a most variable species and 
before extensive cultures had been made the separation of the 
variable forms into distinct species seemed possible. А careful 
examination of plants grown under cultivation has been sufficient, 
however, to convince the writer that this should not be done, 
for there is no line which can be drawn between one variable form 
and another. While no material is available of Ch. formosum, 
Ch. formosum, var. neglectum and Ch. formosum, var. ovatum, all 
of which were described by Bainier in his monograph of Chae- 
tomium, the writer is strongly of the opinion that they should be 
considered rather as variations of the type form. 
he specimen in Fung. Europ. No. 3340 has been examined 
and found to be typical of Ch. bostrychodes Zopf. 
24. CHAETOMIUM QUADRANGULATUM Chivers, Proc. Am. Acad. 
48: 85. 1012 
PLATE 14, FIGS. 1-8 
Gray. Perithecia rather large and elongated, barrel-shaped, 
403 X 294 и (333-456 X 243-350), frequently provided with one 
or more very long cirrhi, producing a mass of dark olive rhizoids 
near base. Lateral hairs numerous, slender, straight, regularly 
and distinctly septate, at the base dark olive to black, minutely 
roughened and about 7.5 шіп thickness, in upper part pale yellow 
or hyaline, smooth. "Terminal hairs of two types; (a) unbranched, 
minutely roughened, below dark olive-brown to black, straight, 
septate, above coiling in the form of a spiral with 2-6 convolu- 
tions, near tips light olive-yellow or colorless, sparsely septate; 
(0) showing tendency to twist in spiral fashion near the middle of « 
their length, or curved or sometimes nearly straight throughout, 
