200 



Cincinnati Society of Natural History. 



Agakicus campestris, Linn. — On rotten dung. Cincinnati, April 18, 

 1842.* 



Agaricus (Pratelli) fabaceds, n. sp. — On the ground, amongst 

 dead leaves in open woods. Waynesville, Sept. 10, 1844. 



Pileo tenui, subcarnoso, umbonato, albo, demum piano ; stipite gla- 

 bro, fibrilloso, basi bulbosa excepte aequali, albo; velo amplo, extus 

 floccoso ; lamellis confertis, tenuissimus, liberis, brunneis. 



Pileus four to five inches across, thin, almost submembranaceous, 

 umbonate, conical when }'Oimg, becoming nearl}- plane as it expands, 

 white, viscid when moist ; epidermis smooth, tough, feeling like fine 

 kid leather, turning 3'ellow when bruised ; stem three to four inches 

 high, one third of an inch thick, white, smooth, with the exception of 

 a few fibrilla, equal except at the base ; veil large, at first covering the 

 gills and connecting the margin with the stem, white, externally 

 flocose ; gills crowded, very thin, not ventricose, free, brown when 

 young, then darker brown, at length almost black like the dark part of 

 a bean flower. — A fine species allied to A. arvensis. When }'oung it 

 has a peculiar, but not unpleasant smell. 



Paxillus porosus, n. sp. — In moist woods. Waynesville, Aug. 23, 

 1844. 



Pileo excentrico, carnoso, nitido ; stipite lento, sursum reticulato ; 

 hymenio toto poroso, flavo. 



Pileus two to five inches broad, one quarter to three quarters of an 

 inch thick, fleshy, viscid when moist, reddish-brown, rather shining; 

 margin thin and even ; stem lateral, one inch or more high, one third 

 of an inch thick, tough, diflused into the pileus, reticulated above by 

 the decurrent hymenium ; hymenium 3'ellow, porous, formed by radiat- 

 ing thin folds from a line to half a line distant, branching and con- 

 nected by numerous irregular veins, so as to form large angular pores, 

 the radiating folds being broader than those which connect them ; 

 spores semi-ovate ; smell very strong and unpleasant. Nearly allied 

 to Paxillus involutus, but apparently distinct. The spores are of the 

 same form but larger than in that species. Without examining the 

 fructification it might be taken for a Boletus. 



Paxillus flavidus, n. sp. — On the ground amongst grass, in dry 

 open woods. Wa} T nesville, Sept. 20, 1844. 



* Six days after the specimens were collected and put to dry. on opening the paper they 

 had the smell, and produced the sensation on the eyes and nose, of hartshorn. This van- 

 ished in a short time on exposure to air. 



