132 AGARICUS. 



Mycenr. 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-cyaneus 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. Eur. p. 139. Icon. t. 80. /. 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 plane, 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 ccespitose. 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. /. 4. B. &> 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-campanulate, obtuse, 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 caespitose. Var. minor, with stem pruinate at the apex, is 

 not constant. 



