1895.] MICROSCOPICAL JOURNAL. 71 



1 Spores plurilocular, colorless, or decolorate, — Continued. 



m Apothecia zeorine c 



c Thallus mouophylous, multifid, squamulose or crnstaceous 



22 Pannaria 

 c Th. foliaceous or fruticulose, mostly lead colored, gonimia 

 concatenate 28 Leptogium 



m Apothecia biatorine d 



d Thallus monophyllous, multifid squamulose or crustaceous 



22 Pannaria 

 d Th. foliaceous or fruticulose, mostly lead colored, gonimia 



concatenate 28 Leptogium 



d Th. foliaceous, lead colored, gonimia in short chains 



29 Hydrothyria 

 d Th. unitorm with a crenulate margin ; apothecia urceolate 



35 Gyalecta 

 m Apothecia urceolate e 



e Spores cylindraceous, very long, plurilocular, colorless, 



bi-quadri pluri-locular, uncolored 34 Conotrema 



e Spores ellipsoid, fusiform or acicular, bi-quadri-pluri-locular, 



uncolored 35 Gyalecta 



e Spores ellipsoid and oblong, bi-pluri-locular, muri- 



form, multilocular, brown or decolorate 37 Thelotrema 



e Spores ellipsoid and oblong, murilbrm plurilocular, brown 



38 Gyrostomum 

 m Apothecia rounded f 



f Each ceil containing a single theke Myrianginm 



f Apothecia immersed in a white stroma 1 



1 Apo. plano-convex, immarginate 54 Chiodecton 



1 Apo. concave, black 55 Glyphis 

 f Apo. iu a pseudo-stroma 2 



2 Stroma difform, rounded or stellate 56 Arthonia 



2 Stroma difform with 1-6 hymenia 57 Mycoporum 

 m Apothecia difform g 



g Spores ellipsoid, muriform, pluri-locular, brown 



38 Gyrostomum 

 g Spores fusiform, or oblong-ovoid, uncolored 54 Chiodecton 

 m Apothecia oblong h 



h Spores fusiform, obloug-ovoid, uncolored, quadri- pluriloc- 

 ular, muriform multilocular 54 Chiodecton 

 h Spores ellipsoid, oblong 'brown or decolorate, quadri- 



plurilocular 55 Glyphis 



h Spores obloug-ovoid or fusiform, brown or decolorate 2-4 

 plurilocular or muriform multilocular 56 Arthonia 



m Apothecia immersed in the thallus i 



i Spores uncolored 65 Segreslria 



i Spores brown or decolorate 3 



a Thallus foliaceous, mouophj'llous or squamulose and sub- 

 crustaceous 63 Eudocarpon 



3 Thallus lobulate or uniform 66 Staurothele 

 m Apothecia innate superficial j 



j Spores cymbiform, fusiform acicular, colorless 68 Sagedia 

 j Sp. ovoid-ellipsoid, decolorate or colorless 69 Verrucaria 



m Apothecia prominent opening only by a pore at the sum 

 mit k 

 k Apo. depressed, globose, spores oblong or ovoid 72 Strigula 

 k Spores elipsoid oblong 70 Pyrenula 



