(177) 
Sub- Fam. 3.— EULECIDEEI. 
Apothecia subsessilia, excipulo atro. 
XLIV.—LECIDEA (Ach.) Fr., emend. 
Fr. Vet. Ac. Handl. 1822, et 8. O. V. p. 252, max. p.; L. E., p. 231, spp. 
excl. Eschw.Syst.p.17. Flot. Lich. Sil.; in Koerb. Grundr.d. Crypt.; 
in Bot. Zeit. 1850, p. 882. Mont. Apercu Morph.1.c. p.11. Tuckerm. 
Syn. N. E. p. 63; Lich. Calif. p. 24. Lecidea, Ach. L. U. p. 82, Syn. 
p. 11, pr. p. Scheer. Spicil. p. 101, Enum. p. 94, pr. p. Eschw. Lich. 
Bras. l.c. p.241, pr. p. Nyl. Enum. Gén. 1. c. p. 123, Lich. Scand. p. 185, 
Lich. And. Boliv. 1. c. p. 381, Addend. nov. ad Lich. Eur. in Flora 
Ratisb.; pr. p. Patellarie spp., Mey., Wallr. Lecidea et Scolecites, 
Norm. Con. p. 22. Thalloidima, Psore sp., Lecidea, Arthrosporum, 
Toninia, Rhaphiospora, pr. p., et Sporastatia, Mass. Ric., et opp. varr. 
Astroplaca, Thalloidima, Schereria, Porpidia, Stenhammera, Lecidella, 
Lecidea, Arthrosporum, Toninia, Rhaphiospora, pr. p.; et Sporastatia, 
Koerb. Syst.; Parerg. Lecidea max. p., Stenhammera, Scolecites max. 
p., Biatore sp., et Sporostatia, Stizenb. Beitr. 1. c. 
Structuram exposuerunt Tulasne, Mém. sur les Lich. pp. 15, 165, 
t. 13, f. 14-17; Fuisting 1. c. p. 23. 
Apothecia patelleformia, excipulo proprio carbonaceo, atro. 
Spore ex ellipsoideo fusiformes 1. dein aciculares, e simplici, rarius 
bi-quadri-pluriloculares, incolores. Spermatia ex oblongo bacillaria 
1. filiformia; sterigmatibus subsimplicibus. Thallus crustaceus, 
effiguratus aut uniformis. 
“ Servavi hoc loco genus eodem sensu, quo primitus proposut, utpote 
habitui et practice Lichenum cognitioni optime inserviente. Recentiores 
ad species disco strato carbonaceo imposito tuntum restrinzerunt, et, licet 
hi limites magis Systematici videantur, in natura facile evanescunt et 
simillima removent.” Fr. L. H. p. 282. In accordance with the method 
of the present treatise, the species with brown spores are however 
excluded; and the systematic value of the several structural modifica- 
tions of the colourless spore is estimated as in Lecanora and Biatora. 
Almost all the Lecidee@, as here understood, were first made known as 
European; it is yet every way probable that a very large part of these 
will prove to be common to the northern hemisphere. And Nylander has 
shewn (Lich. And. Boliv.) that the group of familiar, saxicoline species 
typified by L. contigua is well represented in the Andes of South America; 
which thus afford, he says (J. c., in Ann. 4, 15, p. 366) additional evidence 
of the truth of what he has elsewhere affirmed—that the saxicoline 
lichens, generally, have of all others the widest distribution. 
But what with the abundance and variableness of the rock-Lecidee, 
23 
