OF ARTS AND SCIENCES : APRIL 12, 1864. 275 



Cuba, Mr. Wright (Lich. Cub. n. 194). It is impossible not to dis- 

 tinguish this lichen from L. aurigera, Fee (Lich. Cub. n. 193) ; but 

 both may prove to be conditions of a single type. The granulate 

 thallus of L. aurigera is (at least originally, or often) pale-sulphur- 

 colored within, and the narrower margin of the thinner and darker 

 apothecia is at length subcrenulate. L. hypomela, Nyl. (Lich. Exot. 

 in Ann. Sci. Nat. 4, 11, p. 223) also occurring in Cuba, is another 

 sufficiently distinct-looking member of the same group, with a thin, 

 and, as compared with the others, depauperate thallus, and still darker, 

 entire apothecia. The spores vary in dimensions in all three, and 

 scarcely afford distinguishing characters. 



Lecidea (Biatora) chlororphnia, sp. nov. : thallo granuloso- 

 farinoso ochroleuco ; apotheciis valde minutis innatis planis rufo- 

 fuscescentibus margine tenui evanido. Sp. in thecis clavatis 6 - 8nae, 

 incolores, simplices, ellipsoidete dein oblongo-ellipsoide£e,limbat!B, diam. 

 2^ - 3° longiores. Paraphyses distincta^. On Ficus, Hong Kong, 

 China (U. S. N. Pacif. Expl. Exp.), Mr. Wright. Very like a minute 

 form of L. quernea, (Dicks.) Ach. The European lichen is pronounced 

 immarginate by several recent writers, but an obtusish, paler, flexuous 

 excipular margin (contrasting with that of the present) is certainly 

 evident in Nyl. Lich. Par. n. 134, and also in an equally fine specimen 

 from Borrer. The spores of Mr. "Wright's plant are always colorless, 

 while those of L. quernea (passing from subglobose into ovoid-ellipsoid) 

 are at length, in all my specimens, brown, as indicated by Dr. Koerber 

 (Syst. p. 209), who distinguishes the lichen from Biatora by this 

 certainly remarkable character. The hypothallus of L. quernea is 

 originally whitish, according to Koerber, 1. c, but it certainly appears 

 to blacken (as indicated by Fries) in a specimen from Portugal 

 (Welwitsch. Cr. Lus. n. 53) before me, which is both bordered and 

 decussated by black lines. 



Lecidea (Biatorella) Wrightii, sp. nov.: thallo e granulis sub- 

 tartareis globularibus conglomeratis glaucescentibus cum hypothallo 

 confusis ; apotheciis mediocribus adnatis e fusco nigricantibus disco 

 subplano primitus cinereo-pruinoso hypothecio fusco-nigro imposito 

 marginem obtusum integrum demum subexcludente. Sp. in thecis 

 elongatis oblongis myriosporis minutissimse, globuloste, incolores. Pa- 

 raphyses filiformes distinctjE. On the earth, growing upon mosses, in 

 the eastern parts of the island of Cuba, Mr. Wright (Lich. Cub. n. 235). 



