148 FUNGUS-FLOKA. 



the margin is perhaps straight, but from analogy nearest to 

 Collybia rancida. (Fries.) 



Differs from C. rancida in absence of smell, and from 

 C. protracta in the free gills. 



Collybia atrata. Fr. 



Pileus 1-1 1 in. across, flesh rather thick, firm ; orbicular, 

 disc often slightly depressed, margin arched, very smooth 

 and even, viscid after prolonged rain, pitch black and 

 shining when moist, fuscous when dry; gills adnate, 

 scarcely decurrent, arcuate, then plane, rather broad and 

 distant, whitish, then greyish or brownish ; stem up to 1 in. 

 long, 12 lines thick, equal or slightly thickened upwards, 

 round, even, glabrous, brown both inside and outside ; 

 stuffed, often becoming hollow, distinctly cartilaginous, 

 tough. 



Agaricus (Collybia) atratus, Fries, Syst. Myc., i. p. 168; 

 Cke., Hdbk., p. 73 ; Cke., Illustr., pi. 155A. 



On the ground in sunny places, and especially where the 

 ground has been burnt. 



Small, firm, pileus often umbilicate, a distinct species, but 

 hovering between Collybia and Omphalia. 



Collybia ambusta. Fr. 



Pileus J-l in. across, flesh very thin ; convex then plane, 

 at length depressed, with a minute papillate umbo, glabrous, 

 brown at first, even, then slightly striate and fusco-livid, 

 margin involute at first; gills adnate, with a decurrent 

 tooth, crowded, plane, lanceolate, becoming tinged with 

 brown ; stem about 1 in. long, rarely more, not 1 line thick, 

 at length hollow, truly cartilaginous, straight, livid brown, 

 pruinose when young, naked when adult ; spores 5-6 X 3-4 /x. 



Agaricus (Collybia} ambustus, Fries, Epicr., p. 97; Cke., 

 Hdbk., p. 73; Cke., Illustr., 155s. 



On scorched ground, &c. 



Small, tough, often gregarious, inodorous, entirely sooty- 

 brown. Closely allied to C. atrata, but the present species 

 approaches Mycena to the same extent that C. atrata does 

 Omphalia. The present species is certainly a Collybia, as 

 shown by the margin of the pileus being incurved at first. 

 (Fries.) 



