210 



tuse, persistent thalline margin soon blackening, and the fruit 

 lecideoid. Hypothecium black. Spores ^ mic. 



Sandstone rocks, Moulton, Alabama, Hon. T. M. Peters. 

 Apothecia O mm -, 5 to O mm -, 8 wide. 



14. E. milliaria, Tuckerm. ; thallus thin, chinky, granulate, 

 and rugulose; greenish-fuscescent ; apothecia minute, adnate; 

 disk flattish, blackish-brown and black, opake ; the thin, entire 

 margin blackening or excluded. Hypothecium blackening. 

 Spores *^ 5 mic. Obs. Licit. 4, 1. c. p. 175. 



Trees and shrubs, about Boston, Tuckerman. New Bedford, 

 Willey. Western New York, Miss Wilson. Spores, accord- 

 ing to Mr. Willey, now in 12 s -, as in the now similar R. sopho- 

 des, e, in Biatora exigua and in Lecidea myriocarpa. 



15. E. Conradi, Koerb. ; thallus incrusting, thin, chinky and 

 granulate ; greenish-glaucescent and cinerasceut ; apothecia 

 zeorine, small, sessile, flattish ; the plano-convex disk blackish- 

 brown, distinctly marginate; the thalline margin sub-entire, or 

 rugose-crenulate. Spores from bilocular passing into quadri- 



locular, and the two middle cells then divided, jjjj| mic. Koerb. 



Syst. p. 123. Th. Fr. Scand. p. 198. Lecanora pyreniospora, 

 Nyl. Scand. p. 151. Einodina sabulosa, Tuck. Calif, p. 21. 



On gravelly earth near the ocean, San Francisco, California 

 (Bolander), Tuckerman 1. c. 1866. The European lichen (un- 

 known to me at the time of the publication of the American 

 one, and now only in the too scanty Rabenh. Lich. Eur. n. 880) 

 is described as lecauorine, and the spores as " constantly quad- 

 rilocular " (Koerb. I. c.), but I can scarcely doubt the identity of 

 the two plants. Apothecia of ours O mra -, 5 to O mm -, 8 wide. 



* * * Maronea. Spores -very numerous in the thekes. 



16. E. constans (Nyl.) Tuckerm.; thallus verruculose; green- 

 ish-ash-coloured, and brownish; on a black hypothallus; apo- 

 thecia small to almost middling-sized, zeorine, sessile ; the flat, 

 brownish-black and black disk bordered by a tumid, sub-entire 

 thalline margin ; the fruit at length flexuously irregular. Spores 

 very minute and numerous in the thekes, and, in general, colour- 

 less. Tuckerm. Gen. p. 124. Lecanora, Nyl. classif. 2 ; Ejusd. 



Prodr. Gall. p. 89. Maronea Berica, Mass, in Flora, 1856, n. 

 19, & Lich. Ital. n. 346. Lecanora, Tuck. Obs. Lich. 2, I. c. p. 

 403. Maronea Kemmleri. Koerb. Par erg. p. 90. 



