BIATORELLA. 95 



In Kehm's Krypt.-Flora, Disc, p. 341, what the author 

 considers to be this species, is called Karschia olivacea, Renin, 

 and placed among doubtful species ; the description given by 

 Rehm agrees with the above, except that the spores are said 

 to be 2-celled, and this may possibly be their ultimate 

 condition. 



BIATORELLA. De Not. (figs. 56-58, p. 12.) 



Ascophores mostly scattered, sessile, or rather narrowed at 

 the base at first ; disc often rather depressed at first, and 

 more or less marginate, then plane or slightly convex ; usually 

 clear-coloured, rarely blackish, waxy ; asci clavate or cylin- 

 drical avate, apex rounded and thick- walled, and containing 

 numerous minute spores ; spores globose or rather elongated, 

 continuous, hyaline or with a yellow tinge; paraphyses 

 generally branched, septate, spreading at the apex, scarcely 

 coloured ; hypothecium thick, rarely coloured. 



Biatorella, De Notaris, Giorn. Bot. Ital., vol. i. p. 192 ; 

 Rehm, Krypt.-Flora, Disc, p. 303. 



Tromera, Massal., Flora, 1858, p. 507; Sacc, Syll., viii. 

 p. 469 (in part). 



Lecidea, Leighton, Brit. Lichen-Flora, p. 240. 



Distinguished by the minute, discoid, waxy ascophores, 

 and the asci containing numerous minute spores. Has been 

 considered by many authors as belonging to the lichens, 

 hence the literature is mostly contained in works on lichen- 

 ology. 



Biatorella resinae. Mudd, Man. Brit. Lich., p. 191; 

 Rehm, Krypt.-Flora, Disc, p. 306 (not of Leighton, Lich.-Fl., 

 p. 383). (figs. 56-58, p. 12.) 



A scophores gregarious, narrowed at the base, then sessile ; 

 disc depressed at first, and slightly margined, then plane or 

 convex ; reddish-brown or orange colour, waxy and firm ; 

 asci clavate, apex rounded, the upper portion of the wall 

 thick, containing innumerable minute spores ; spores globose, 

 continuous, with a slight yellow tinge, about 3 /a broad ; 

 paraphyses very numerous, about 1 * 5 /x thick, septate, not 

 agglutinated together, forked above, the apex very slightly 



