CHITONIA. 417 



there does not appear to be anything to justify the specific 

 name; the pileus often becoming quite plane, white and 

 shining. The ring often completely disappears at maturity, 

 when the species may cause a little perplexity, being under 

 these conditions technically a Pilosace. 



Agaricus subgibbosus. Fr. 



Pileus scarcely 1 in. across, convexo-plane, subumbonate, 

 even, yellowish, glabrous, but the margin silky-fibrillose ; 

 gills free, remote, white then greyish-brown; stem 1 in. 

 long, 1-2 lines thick, imperfectly hollow ; ring fugacious. 



Agaricus (PsalUota) subgibbosus, Fries, Hym. Eur., p. 281 ; 

 Cke., Hdbk., p. 196. 



In woods, &c. 



It is doubtful whether the present species in reality 

 belongs to the British flora, as the specimens found and 

 figured by Cooke, Illustr., pi. 532, are much larger than the 

 typical form, and also differ in other points, as the large, 

 persistent ring, &c. Cooke's reason for considering his spe- 

 cimens as belonging to the present species is explained as 

 follows. 



The form figured in Cooke's Illustr., t. 532, is referred pro- 

 visionally to this species on the recommendation of the Eev. 

 M. J. Berkeley. It is larger than the typical form. Pileus 

 2-3 in., stem 2-3 in. long, in. thick. (Cke.) 



CHITONIA. Fries (emended), (fig. 4, p. 351). 



Universal veil distinct from the pileus, at maturity 

 forming a distinct volva round the base of the exannulate 

 central stem ; gills free from the stem ; spores brownish 

 purple. 



Chitonia, Fries, Hym. Eur., p. 277 ; Cke., Hdbk., p. 192. 



Analogous in structure with Volvaria and Amanitopsis. 

 An exotic genus, imported into this country. 



Chitonia as defined by Fries, includes both ringed and 

 ringless species, but as the old subgenus Amanita, which also 

 includes some species furnished with a secondary veil and 

 others without, has been divided into two genera, Amanita 

 furnished with a secondary or partial veil that forms a ring 

 round the stem, and Amanitopsis not having a partial veil, 



VOL. I. 2 E 



