206 MONOGRAPH ОЕ CHAETOMIUM AND ASCOTRICHA 
broken. There seems to be every reason to believe that the hairs, 
had not so many been broken away by disintegration, are sufficient 
in number and suitable in characteristics to make up a head typi- 
cal of Ch. cochliodes. The spores are also typical of that species, 
Ch. cochliodes Palliser may be confused, especially when fully 
developed, with Ch. globosum Kze. It may be most easily dis- 
tinguished, in its earlier life history, when the terminal hairs show 
clearly two types; the one straight, stout below, spirally coiled 
above; the other much more slender, loosely spirally coiled, 
twisted or only wavy, and entangling the stouter hairs. 
27. Chaetomium angustum sp. nov. 
PLATE 16, FIGS. 6-І2 
Rich olive-green. Perithecia rather large, subglobose, with a 
bluntly pointed base, 304 X 266 и (280-300 X 240-290), forming 
cirrhi in comparatively few cases, producing a dense mass 0 
dark olive-brown to black, undulate rhizoids. Lateral hairs 
very numerous; obscurely and sparsely septate, either stout, 
tapering, dark, olive-brown to black at base and about 6.6 in 
thickness, fading above and becoming pale yellow, hyaline at 
tips, or slender, olive-yellow and flexed or irregularly, spirally 
twisted. Terminal hairs of three types: (a) straight, long, taper- 
ing, dark olive-brown to black at base, light yellow to hyaline 
at tips, minutely roughened throughout with spines, obscurely 
septate or continuous, at base about 6.7 шіп thickness; (0) slender, 
graceful, below straight or only slightly flexed and about 3.8 и in 
thickness, in upper portions coiling spirally with about 5-7 con- 
volutions which are comparatively small in diameter, minutely 
roughened throughout, sparingly septate or continuous, at base 
dark olive-brown, fading toward the tips; (c) stout, coarse, 
roughened throughout, sparingly and obscurely septate, below 
straight, very dark olive-brown, at base about 7.5 и in thickness, 
above spirally coiled at first regularly coiled with 2-3 convolutions, 
often becoming irregular and retaining only a single coil near the 
middle of their length from which, frequently, one or two branches 
arise. Asci irregularly club-shaped, 8-spored, 50 X 14 и, pars ` 
sporif. 23 u. Spores when young greenish, hyaline, filled with 
irregular, refractive globules, when mature dark olive-brown, 
чеге бирд кы apiculate or umbonate, 10 X 8и (9.7-10.5 X 7-37 
On culture of bat dung from Porto Rico (Chivers No. 25). 
This species may be confused with Ch. cochliodes Palliser, ОП 
