13 2 AGARICUS. 



Mycen?. smooth, dry. Gills simply adnate, ascending, somewhat distant, 

 rarely connected by veins, quite entire, white, somewhat grey at 

 the base. 



Stem less rigid than that of A. galericulatus. Truly gregarious or caes- 

 pitose. Plainly different from A. atro-cyanens Fr. Once found growing on 

 stem of Aspidiumfelix-mas. Lasting during winter. 



On rotten wood, especially fir. Uncommon. Sept-Dec. 



Spores 12x6 mk. B. ; Name parabola. Shaped like a parabola. Fr. 

 Monogr. i. p. 211. Hym. Enr. p. 139. Icon. t. 80. f. 3. Berk. Out. p. 124. 

 B. & Br. n. 1640*. C. Hbk. n. 183. Illust. PI. 224. S. Mycol. Scot. n. 

 155. Sow. t. 165 (pileus pallid). 



274. A. tintinnabulum Fr. Pileus 2.5 cent, (i in.) broad, of 

 one colour (various) for the most part date-brown but becoming 

 pale, somewhat membranaceous, also very tough, campanulato- 

 convex, when full grown rather plcme, scarcely umbonate, wholly 

 even and without striae, somewhat viscid when moist. Stem short, 

 commonly 2.5 cent, (i in.) long, not 2 mm. (i lin.) thick, always 

 even, smooth, pallid, very tough, shortly white-strigose at the 

 base. Gills adnate, decurrent with a tooth, horizontal, very thin 

 and crowded, narrow, becoming pale, at length slightly inclining 

 to flesh-colour. 



Colour very variable (though unicolorous) becoming azure-blue, pale yel- 

 lowish-fuscous, whitish. Commonly gregarious, more rarely csespitose. Like 

 A. parabolicus, c., very much allied to A. galericulatus, but smaller. 



On fallen beech-trunks, c. Glamis, 1876, &c. Oct.-Dec. 



Remarkable for its power of living through low temperature. Name tin- 

 tinnabulum, a bell. From its bell shape. Fr. Monogr. i. p. 211. Hym. Eur. 

 p. 140. Icon. t. 80. f. 4. B. 6 Br. n. 1746. S. Mycol. Scot. n. 156. C. 

 Illust. PL 224. 



IV. FRAGILIPEDES. Stem fragile, &^c. 



275. A. atro-albus Bolt. Pileus about 2.5 cent, (i in.) broad, 

 somewhat membranaceous, parabolico-campa?iulate, obt2ise, the 

 blackish disc even, whitish and slightly pellucid-striate round the 

 margin, not hygrophanous. Stem 7.5-10 cent. (3-4 in.) long, al- 

 most 4 mm. (2 lin.) thick, remarkably fistulose, tense and straight, 

 even, shining, of two colours, darker at the apex, with a hairy 

 bulbous- swollen root. Gills free, ventricose, crowded, white then 

 becoming glaucous. 



Firmer than the others in this section, but neither rigid nor fusiform-rooted ; 

 distinguished from them all by its swollen, inflated, hairy base. Solitary or 

 gregarious, not ccespitose. Van minor, with stem pruinate at the apex, is 

 not constant. 



