OF ARTS AND SCIENCES; APRIL 12, 1864. 281 



(Mont.) and L. vigilans (Tayl.), or that the latter belong to the same 

 natural group with L. tuberculosa, Fee ; and, in that case, the group 

 cannot well be limited by the number of the sporoblasts, any more than 

 Bilimhia. But the spores of L. endochroma, and of the species de- 

 scribed above, are remarkable (as compared with other BomhyliosporcB) 

 for their smallness, and are comparable rather with those of L. atro- 

 purpurea (Massal.), which is L. intermixta, Nyl. This is not always 

 unlike small states of L. tuberculosa, &c., and I have seen similar states 

 of L. vigilans referred to its neighborhood at least (under the name of 

 " L. carneola" in which was understood possibly the rather unfortunate 

 vai\ arceutina, Ach,) in European collections. 



Lecidea (Bombyliospora) pachycheila, sp. nov. : thallo contiguo 

 injequabili mox verrucoso glaucescente hypothallo demum nigro sub- 

 limitato ; apotheciis mediocribus adnatis disco subplano rufo-nigricante 

 margine tumido obtuso albido persistente. Sp. 2 - 4na3 in thecis ob- 

 longis, magnte, oblongo-enipsoideEe-, 4 - 8-blasta}, sjepius curvute, diam. 

 3-5° longiores. Trunks. South Carolina, Mr. Ravenel. Mississippi, 

 Dr. Veitch. Alabama, Mr. Beaumont. Island of Cuba, Mr. Wright. 

 (Lich. Cub. n. 230.) Distinguished from L. pachycarpa and tubercu- 

 losa by its shorter, curved (now lunate, and now S-shaped) sporee, 

 which occur in twos, thi'ees, and fours, in the sporesacks ; as well as 

 by its thick, white exciple, which is often tumid, when there is some 

 appearance of an accessory or false margin. 



Lecidea (Bombyliospora) aureola, sp. nov. : thallo cartilagineo 

 contiguo tenui rimoso flavido hypothallo tenui nigricante ; apotheciis 

 parvis sessilibus disco plano-convexo opaco fulvo-aurantiaco hypothecio 

 pallido imposito marginem tenuem integerrimum concolorem sub- 

 Eequante. Sp. 6 - 8nse in thecis clavatis, incolores, dactyloideee vel 

 subfusiformes, 5 - 6-blast3B, sporobl. rotundatis, diam. 4-6° longiores. 

 Paraphyses mox distinctaj. Trunks, in the island of Cuba, Mr. Wright. 

 Comparable with L. Domingensis (Pers.), Nyl. ("Wright Lich Cub. n. 

 231), but receding still further from the type of Bombyliospora. 



Lecidea (Heterothecium) vulpina, sp. nov. : thallo tenui subcar- 

 tilagineo contiguo inajquabili dein rugoso-verruculoso e glaucescente 

 aurantiaco-flavido hypothallo tenui nigricante ; apotheciis sub-medi- 

 ocribus sessilibus margine obtuso integro ex aurantiaco sanguineo-rufo 

 discum planum rufo-nigrescentem subpulverulentum hypothecio palHdo 

 impositum superante. Sp. 2-4iise in thecis, mediocres, fere semper 



