174 MONOGRAPH OF CHAETOMIUM AND ASCOTRICHA 
below dark olive, straight and about 3.7 и in thickness, above 
fading to light olive-yellow or becoming colorless, апа spirally 
coiling at first tightly, finally becoming extended and drawn out 
into a twisted thread. Asci club-shaped, 8-spored, 45 X 9.7», 
pars sporif. 24 и. Spores pale olive, lemon-shaped, apiculate at 
both ends, 6.4 X 5.2-5.6 u. 
Frequent in cultures of various substrata from New England. 
Appearing in cultures of dung from Holland and South America 
(Chivers No. 27). 
This species may be easily distinguished by its characteristic 
hairs; the lateral ones being short, straight, dark below, tightly 
coiled into a spiral of small diameter, hyaline and refractive at 
the tips; the terminal ones slender, at first tightly coiled into a 
fine delicate spiral, later elongated, twisted rather than coiled, 
and giving the appearance of woolly threads. 
10. CHAETOMIUM AUREUM Chivers, Proc. Am. Acad. 48: 86. 
1012 
PLATE 11, FIGS. 12-17 
Gray, pale olive, becoming yellow, at length golden-yellow. 
Perithecia minute, globose or subglobose, often bluntly point 
at the base, 127 X 115 (110-140 X 105-123), without differ- 
entiated rhizoids, provided with a long, slender, arched or re- 
curved cirrhus. Lateral hairs numerous, slender, straight or 
flexed, regularly and distinctly septate, olive-yellow, minutely 
roughened, with nearly equal diameter throughout, 3.5 шіп thick- 
ness, broadly arched at tips. Terminal hairs olive-yellow, regu- 
larly septate, minutely roughened, straight or slightly re-curved, 
at base about 3.8 u in thickness, at tip nearly straight or incurved. 
Asci club-shaped, 8-spored, 42 X 10 и, pars sporif. 26 и. Spores 
when young filled with refractive globules, when mature olive- 
brown, irregularly ovate, apiculate at both ends, 9.8 X 5.44 
(9.4-11 X 4.7-5.6). 
On paper, dung and other materials of various kinds from 
New England (Chivers No. I). In cultures of old paper from 
Java (R. Thaxter). 
г Тһе small size and characteristic golden yellow color clearly 
distinguish this species from all others except Ch. trilaterale and 
Ch. fusiforme. From the former of these it differs in that the 
spores are discharged in long black cirrhi, in the comparative | 
obscurity of the perithecial hairs at maturity, in the incurved | 
