het, 1.160, 
bly with the 
1. p.199, 
round, kc. 
ranuliferis. 
Falklands, ete.] CRYPTOGAMIA ANTARCTICA. 229 
6. Lecanora Babingtoni, Hook. fil. et Tayl.; thallo crustaceo adnato orbiculari subsquamuloso 
areolato areolis radiantibus albido-glaucescente demum virescente, squamulis diffractis ambitu sub-continuis 
crenulatis, apotheciis adnatis margine thallode tenuissimo evanescente, disco atro primitus tumido margine 
subelevato demum planiore immarginato. Lecidea atro-alba, nobis in Lond. Journ. Bot. vol. iii. p. 636 
(quoad exempl. Ins. Cockburn). (Tas. CXCVILII. Fig. II.) 
Has. Cockburn Island, Graham’s Land; on volcanic rocks. 
Thallus inconspicuus 4—1 unc. diametro, margine definito crenulato, totus in areolas minimas (non nisi ope lentis 
conspicuas) diffractus ; areolis angulatis, albidis, saxæ adnatis, centralibus fertilibus, reliquis radiantibus, extimis 
subfoliaceis lobatis crenulatisve. Apothecia punctiformia, interiora majora subconfluentia. 
Although the specimens of this plant brought from Cockburn Island are very perfect and well developed, they 
belong to so difficult a group of Lichens as to have baffled the Rev. Mess. Babington, Berkeley, and ourselves, 
in our attempts to reduce it to any known species. Though closely resembling a Lecidea in habit, and, indeed, in 
characters too, it is certainly not of that genus, for though, as Mr. Berkeley remarks, the apothecia of Lecid. rivulosa 
and confluens are sometimes obscurely margined (as in this species), yet, Mr. Babington observes, that the thallus 
here is radiating, which is not the case with the areolate Lecidee, nor has it the carbonaceous margin to the 
apothecium and substratum of that genus. 
Of the tribe in which it should be placed (as a Zecanora) there is some doubt: Mr. Berkeley regards it as 
belonging to the section “ glaucescentes ” of Placodium, Fries, and allied to L. coarctata, in which the thallodal border 
of the apothecium is evanescent. Mr. Babington, on the other hand, remarks, that the thallodal border and that 
of the disc itself place it in Psora, Fries, and that it will rank amongst the section “ glaucescentes” near L. melanaspis, 
of which it may possibly be a variety, or a depauperated and crustaceous form. The figure represents the plant as 
freshly gathered, before drying; it has since assumed a more obscure, somewhat leaden colour, and the oldest 
portions of the thallus break up into a greenish mass, which is not given in our plate. 
Prare CXOVIIL Fig. IL—1, plant of the natural size; 2, portion of ditto; 3, central part of thallus and 
apothecia; 4 and 5, lateral views of areola and apothecia; 6, vertical slice of two apothecia ; 7, portion of lamina 
proligera :—highly magnified. 
7. Lecanora gelida, Ach.; Lich. Univ. p. 428. Engl. Bot. t. 699. Urceolaria macropthalma, nobis 
in Lond. Journ. Bot. vol. iii. p. 640. 
Var. B. vitellina, thallo vitellino. 
Has. Kerguelen's Land ; both varieties very common. 
The variety 8. is probably dependent on thé thallus. having changed colour. What was described as Urceolaria 
macropthalma is a state noticed by Fries (Lich. Europ. p. 104).  C.Babington. 
8. LECANORA murorum, Ach.; Lich. Univ. p.433. Engl. Bot. t. 2157. 
Var. farcta; apotheciis substantia granulata fere clausis. 
Has. Hermite Island, Cape Horn, the Falkland Islands, and Cockburn Island, Graham's Land; on 
maritime rocks. Var. 8. Kerguelen’s Land; on rocks near the sea. 
9. Lecanora miniata, Ach.; Lich. Univ. p. 434. Hoffm. Plant. Lich. t. 60. f.1. 
Has. Falkland Islands, and Cockburn Island, Graham’s Land; very abundantly on rocks near the sea. 
This plant forms the most curious feature in the botany of Cockburn Island, a desolate spot of land on the 
extreme limit of southern vegetation; for there it abounds so as to stain the rocks, and render the colour thus 
