PRATELLI. 327 



** Gills plane, very broad behind, somewhat dectirrent. Psilocybe. 



731. A. ammophilus Dur. & Mont. Pileus somewhat fleshy, 

 hemispherical then umbo-form. Stem at length soft, hollow, 

 buried half-way up in the sand, base clavate. Gills somewhat de- 

 current with a tooth, smoky, black-pulverulent with the spores. 



The affinity of this species is uncertain, but it is remarkable for the base of 

 the stem being buried and clavate. 



On sandy ground on the sea-shore. St Andrews, 1874. Sept. 



Spores 12x8 mk. B. &= Br. Name a/a/xos, sand; <iXos, loving. ExpL 

 sclent. Alg. t. 31. Fr. Hym. Eur. p. 299. B. & Br. n. 1661. S. Mycol. 

 Scot. n. 393. C. Illust. PL 606. B. 



732. A. coprophilus Bull. Pileus 2.5 cent, (i in.) broad, rufes- 

 cent-tan, slightly fleshy, hemispherical then expanded, umbonate, 

 even, smooth, scarcely viscous. Stem short, 2.5 cent, (i in.), 

 somewhat fistulose, at first containing a pith, shaggy-flocculose, 

 then elongated and becoming smooth, shining, 2 mm. (i lin.) 

 thick, attenuated upwards zntipruinate at the apex. Veil scarcely 

 conspicuous. Gills somewhat arcuato-decurrent, broad, crowded, 

 livid then fuscous. 



On dung. Rare. Autumn. 



Pileus at first white and downy, clothed with little superficial scales, brown, 

 at length smooth and umber, M.J.B. Name nonpos, dung; </H'AOS, loving. 

 Bull. t. 566. f. 3. Fr. Monogr. i. p. 431. Hym. Eur. p. 299. Berk. Out. p. 

 171. C. Hbk. n. 434. Illust. PL 608. A. 



733. A. bullaceus Bull. Pileus 8-12 mm. (4-6 lin.) broad, 

 dark (bay-brown) tawny, then ochraceous-brick and tan when 

 dry, slightly fleshy at the disc, almost membranaceous at the 

 margin, hemispherical, obtuse, then expanded, umbonate, covered 

 with a viscous separable pellicle, smooth ; margin at first even, 

 appendiculate with the veil, then striate and naked. Stem 2.5 

 cent, (i in.) or little more long, 2 mm. (i lin.) thick, fistulose, equal 

 or attenuated at the base, furnished with a cortina when young 

 hence slightly fibrillose, slightly tawny then becoming yellow, 



fuscous-ferruginous at the base. Gills adnate, in no wise decurrent, 

 somewhat triangular, plane, crowded, livid-whitish then fuscous- 

 ferruginous. 



The spores are purple-lilac on a black ground like those of A. coprophilus. 

 Gregarious, beautiful. 



On dung, chiefly horse. Frequent. Aug.-Sept. 



Spores sphaeroid-ellipsoid, 6-iox 4-7 mk. A^. , n x 7 ink. W.G.S. Name 

 bulla, a knob. Furnished with an umbo. Bull. t. 566. f. 2. Fr. Monogr. i. 



