176 Cincinnati Society of Natural History. 
finely and obscurely rimose-striate, pale grayish-brown. Stipe elon- 
gated, fragile, hollow, slightly tapering upward, white, the lower half 
clothed with loose cottony flocci which rub off easily, the upper half 
smooth or slightly farinaceous. Lamelle narrow, close, free. Spores 
oval or somewhat oblique, apiculate, .012 <.010 mm. 
On rich ground and manure. Pileus 2-1 in. in diameter, expanding 
to 14-12 in.; stipe 3-5 in. long, and less than 4 of an inch thick. 
-Gregarious and czespitose, very fragile. 
10. C. PULCHRIFoLIUS, Peck.—Pileus membranaceous, conical or 
campanulate, striate to the small even yellowish disk, cinereous, 
strewn with minute whitish scales or granules. Stipe slender, fragile, 
hollow, white. Lamelle narrow, crowded, free, white then cinnamon- 
brown. Spores elliptic, brown with a slight rosy tinge, .0070x 
.0056. mm. 
On the ground among the old leaves in woods. Solitary; pileus 3-1 
in. in diameter, and 3-1 in. in height; stipe 2-3 in. high, and 4 of an 
inch or less in thickness at the base. This is a very singular and 
beautiful little plant growing solitary in the woods. According to 
Prof. Peck it is scarcely a Coprinus, because the lamellz are not 
deliquescent, but it has no place among either the black or brown- 
spored Agarics, and therefore for the present is placed in the genus 
Coprinus. 
TrisE II,—Ve trrormes.—Pileus extremely thin, at length splitting 
along the back of the lamelle, plicate-sulcate. Stipe slender, hollow. 
Lamellee dissolving into fine lines. 
a. Lamelle free from the stipe. 
ll. C. nycrHemerus, Fr.—Pileus very tender, at first conic-cylin- 
dric, farfuraceous-floccose, soon splitting, explanate, radiate-plicate, 
naked, forked-striate, gray, the disk brown. Stipe flaccid, glabrous. 
Lamellee free, narrow, at length remote. 
Upon manured land. Pileus, at first 4 of an inch in height; after- 
ward expanding to 4 an inch or more in diameter. Stipe becoming 
pale. 
12. C. Rapiatus, Bolt.—Very small. Pileus very tender, clavate 
then campanulate, cinereous-tomentose, soon splitting, radiate-plicate, 
yellowish, the disk reddish. Stipe filiform, hyaline, becoming glabrous. 
Lamelle free, few, pallid-blackish. Spores .0076 .0050 mm. 
On manure, very common in green houses, in the pots among the 
