PLEURAGE 81 
spores are unable to withstand unfavorable conditions. This 
necessitates the production of the ordinary thick-walled chitinous 
spore. 
A fine specimen of this species is found in Rehm's Ascomycen, * 
no. 234, but in the half dozen or more perithecia examined no 
mature spores seen could with certainity be referred to them. 
They were in exactly the same condition of development as 
the American plants are when usually examined. One can pro- 
duce the white tomentum on the perithecia or prevent its devel- 
opment at will. In the presence of a large quantity of moisture 
there occurs no sign of tomentum, but the perithecia develop nor- 
mally and are black and smooth. If the culture is now allowed to 
become comparatively dry, the tomentum again appears on the 
younger perithecia. 
20. Pleurage longicaudata sp. nov. 
Perithecia scattered, sunken, but becoming half exposed at ma- 
turity, 450-600 pt x 600—900 Jt, thin| membranaceous, greenish 
below when young, but finally becoming black and opaque, glob- 
ular to pyriform with short narrow cylindrical black bare beak. 
Asci clavate, straight or curved, contracted and narrowly 
rounded above and tapering below into a short broad stipe, very 
evanescent, 32-42 2 x 280-300 £: paraphyses very wide, tubu- 
= ventricose, irregular, tapering upward, slightly longer than the 
Sci. 
Spores ellipsoid, rounded at the ends, but usually more acutely 
so above, 23-25 H X 45-53 ہم‎ ranging from hyaline when young 
through olivaceousto dark brown and opaque ; primary appenda- 
ges pestle-shaped, about two-thirds the length of the spore ; second- 
ary appendages covering the entire spore and primary appendages 
as well, being shortest around the equator, increasing in length 
towards the ends where they become united into a very long 
slender fugacious hyaline gelatinous striate-frayed filament. (/7. 
5. f. g—rr. 
Distinctive character: The spore appendages. 
Cultivated specimens: On cow dung, Rooks Co., Kan., July 
1899 (Bartholomew); cow dung, Auburn, Ala., Aug. 1899 (Earle); 
horse dung, Austin, Tex., Jan. 1900 (Long); cow dung, De Soto, 
La., Aug. 1899 (Frierson). 
This is a very striking species which must be studied at the 
time of maturity if one wishes to thoroughly appreciate the beauty 
