OF ARTS AND SCIENCES. 179 



mttlosa, Fr., and Lecidea. canlesrens, Anz. (Lich. Langoh. n. 139) as 

 close, in all respects, to L. sqitalida (Sclileich.) Ach. Curious as it is 

 then, too much stress should perhaps not be laid on the systematic 

 value of the thallus we have been considering, 



BiATORA PETRI, sp. nov. : thallo e sqnamis membranaceo-cartila- 

 gineis ex orbiculatft- oblongo-difFormibus undiilato-lobatis subimbricatis 

 glauco-cinerascentibus (fuscescentibus) subtus ambituque asceiidente 

 mox fiiscis ; apotheciis marginalibus sessilibus nitidis (latit. 1-2 mm.) 

 disco subplano rufo (nigro) margine flexuoso nigro demiim excluso. 

 Sporce octonse, ovoideo-ellipsoideae, simplices, incoloi'es, longit. 

 OjOOO-ll""-, crassit. 0,004-o'"™-, paraphysibus coalitis. 



On lime and other rocks, growing over mosses, Moulton, Alabama ; 

 Hon. T. M. Peters. The smooth scales at length reticulately rimulose, 

 as common especially in B. globifera (Ach.), Fr. ; but the lichen is 

 readily distinguished from the species named, as from B. Russellli. and 

 B. hiridella of these papers, by the colors, and the thinness of the loosely 

 aopo-reffated thallus. 



BiATORA CARNULENTA, sp. nov. : thallo obsoleto ; apotheciis parvis 

 (latit. 0,3-0,6 mm.) adnatis convexis ex albido livescenti-carneolis, mar- 

 gine perquam tenui demisso obscurato vel stei»ius evanido. Hypothe- 

 cium incolor. Sporge octona3, ovoideo-ellipsoideiJe, simplices, incolores, 

 lou'dt. 0,007-12"""-, crassit. OjOOS-o™"-, paraphysibus conglutinatis. — 

 Dead, soft wood in the White Mountains. Found also on the same 

 substrate at Geneseo, N. Y., H. Willey. Reaction of the hymeneal 

 gelatine with iodine, blue. 



BiATORA PELiASPis, sp. nov. : thallo tenuissimo albido vel obsoleto ; 

 apotheciis parvis (latit. 0,3-0,6 mm.) sessilibus subplanis, disco livido- 

 fuscescente pruinato, margine tenui nigro disparente. Hypothe- 

 cium fusco-nigrum. Spor* ellipsoideas, simplices, incolores, longit. 

 0,005-11 mm., crassit. 0,003-5 mm., paraphysibus conglutinatis. — On 

 dead, soft wood, South Carolina, H. W. Ravenel, &c. ; Massachusetts, 

 H. Willey. Very close to this is a minute lichen {B. peliaspi'stes, Mihi 

 herh.) found by me on living hemlock trunks, with leprous-granulose, 

 white thallus ; and on dead, soft wood, without thallus, in the White 

 Mountains, in which the ajiothecia are always naked, and the spores 

 rather smaller (0,005-11 mm. long, and 0.0025-35 mm. thick) and 

 oblong. Both lichens long represented with me the old '' Biatora 

 anomala" of authors. Both exhibit with iodine the same blue re- 

 action. 



BiATORA GLATJCONiGRANS, sp. nov. : thallo granuloso giaucescente; 

 apotheciis (latit. 0,2-0,5 mm.) sessilibus mox convexis e livido-fusco 



