MoNoGRAPH OF CHAETOMIUM AND ASCOTRICHA 167 
Chaetomium griseum Cooke, Grevillea 1: 175. 189%, 
PLATE 8, FIGS. 6-10 
Blue-black. Perithecia of medium size, globose or ovate 
with a bluntly pointed base, 278 Х 267 и (243-337 X 206-337). 
Lateral hairs long, graceful, flexed, insensibly tapering to a point, 
delicate when young, when mature about 7.5 in thickness, . 
dark olive-brown near base, gradually fading at tip, conspicuously 
granular-roughened, or nearly smooth, clearly or obscurely 
septate. Terminal hairs variable with age; when young stout, 
about 5.5 u in thickness at the middle of their length, not circi- 
nately curved at tips, but broadly arched throughout their length; 
at maturity slender, about 4 іп thickness, gracefully flexed ог 
nearly straight, ending in a graceful arch with circinate tip, dark 
rich olive-brown, sparsely and irregularly septate, smooth or 
roughened by irregular projections, in old age becoming still 
darker, frequently losing their circinate tips and tending to 
become wavy throughout. Asci broadly and irregularly club- 
shaped, 8-spored, 53 X 19 и, pars sporif. 34 и. Spores filled with 
greenish refractive globules when young, when mature dark 
olive-brown, globose-ovate to narrow elliptical, apiculate at 
both ends or apiculate at one end and umbonate at the other, 
frequently collapsing by а longitudinal furrow, 12.6 X 8.14 
(1 1.3-12.9 X 8.1), when seen edgewise, compressed, 6.4 и broad. 
Exsiccati.—Fung. Europ., Series II, Edit. nova, ІП, 234. 
Sub Ch. Kunzeanum Zopf: Fung. Gall. XLV, 4436. 
This species is extremely common, growing on dung of various 
animals, especially on dog dung, and on very varied substrata 
from all parts of New England (Chivers No. 13). Reported also 
from Montana, by Ellis and Everhart (Anderson No. 651); 
from England, by Massee and Salmon; and from Germany, by 
Zopf. Type locality: Prague; on damp walls. : 
It may be seen from the above that Ch. griseum described 
by Cooke in 1873 and Ch. comatum, var. helicotrichum by Sac- 
cardo іп 1878 are considered as synonyms of Corda's species. 
А careful study of the former has been made from type material 
received from the Royal Botanic Gardens at Kew and the char- 
acteristics noted seem to agree in every way with those of eh 
murorum, though Cooke stated that the threads of his species 
Were stouter and the spores larger and colorless. Through the 
kindness of Dr. Saccardo it has also been possible to examine 
