58 
rimoso-areolato aurantiaco, cephalodio centrali (6-10 mm. lat.) 
pluribusve depressis radiatim rimosis, concoloribus onusto, ambitu 
lobato; apotheciis (2-3 mm. lat.) sessilibus, disco plano nigro-fusco, 
margine tenui demisso subintegro. Spore in thecis uniserialiter 
octone, ellipsoidex, polari-biloculares, 0,020-30"™ lat., 0,012-20™" 
erass., paraphysibus capillaribus. — Rocks. — Collogonidia of the 
cephalodia 0,006-9"™ in diameter, reddish, solitary or in short 
chains. The name and much of the character of Lecanora dichroa, 
Tayl., l. ¢., suggest the present lichen; but the infertile specimen 
called (notwithstanding its orange colour) Lecanora gelida by 
Taylor (herb.) appears to me to belong here. Thallus at length two 
inches wide. 
6. Lecanora gelida, (L.) Ach.—Rocks.—Thallus and cephalodia 
stouter than I have see them in the northern lichen. Spores 
0,015-23™™ long, and 0,006-12™™ thick. 
7. L. Hageni, (Ach.) Koerb.—Rocks.—Several minute, lecanorine 
apothecia with white, crenate margins, appear to belong here, but 
have afforded no sufficient analysis. Taylor reckons L. subfusca in 
his list. 
8. L. macrophthalma, (Tayl.) Nyl. Urceolaria, Tayl. 1. ¢., 
Lecanora, Nyl. in Flora,"1858 cit. Krempelh.—Rocks.—Thallus like 
that of L. gelida, with which it agrees in possessing similar, but 
more depressed cephalodia; being the third lichen thus curiously 
characterized in this small collection. The apothecia are externally 
best comparable with those of Lecidea endochlora (Tayl. sub 
Urceolaria) but the lichen is probably to be referred to the sect. 
Aspicilia; though spermogones have not been observed. Thalli 
exceeding two inches in width. 
9. URCEOLINA (Genus novum.)—Apothecia urceolata, excipulo 
proprio albido connivente discum rubrum submarginante, margine 
thallino evanido. Spore ellipsoides, incolores, Spermatia acicu- 
laria, arcuata, sterigmatibus subsimplicibus. Thallus crustaceus, effi- 
guratus, : 
Urceolina Kergueliensis (sp. nova) thallo crustaceo adnato 
areolato-verrucoso aurantiaco-fuscescente, verrucis gibbosis centro- 
que substipitatis in ambitum effiguratum coalescentibus ; apotheciis 
(circ. 1 mm. lat.) immersis, margine proprio tenui pallido v. dein 
livido-nigrescente. Spore in thecis uniserialiter octone, simplices, 
limbatez, 0,021-30™ long., 0,015-20" erass., paraphysibus fili- 
formibus. — Rocks. — Specimen scarcely two inches in diameter. 
Whole habit of the pale-ash-coloured young thalli that of simi ar 
thalli of Lecanora chlorophana; but the wart-like areoles becoming 
a little stalked, and the colour finally making as close as possible 
approach, in the brown series, to dirty-orange in the lemon-coloured. 
More or less radiation is evident in the arrangement of the warts 
towards the margin, which becomes lobulate, and the extreme edge 
blackish. Habit of apothecia that of Urceolaria sernposa with 
undeveloped thalline margin. The lichen is not referable to 
Lecanora § Aspicilia; and is excluded by its exciple from § 
Squamaria. soe 
10, Cladonia pyxidata, (L.) Fr.—On the earth. 
