LICHENES ANTARCTICI. 657 
Exceeding 3 inches in diameter, when wet soft and pel- 
lucid; the longitudinal plaits are of different sizes, waved, 
opaque, usually rough with buds which on the Irish speci- 
mens are seen expanding into new thalli. No apothecia ob- 
served in either locality. 
144. C. leucocarpum, n. sp.; thallo foliaceo membranaceo 
levi olivaceo rotundato-rugoso lobis rotundatis integer- 
rimis margine flexuosis, apotheciis centralibus confertis 
albo-incarnatis disco convexo pruinoso margine integer- 
rimo. 
Has. Van Diemen's Land. 
1-2 inches wide, thallus very thin, subpellucid when wet. 
Dissection shews a white pruinose disk, the lamina transpa- 
rent and colourless, resting on a layer of flesh.coloured 
matter. The more aged apothecia are so convex as to 
conceal the border. Related in characters to C. Rottleri, 
Ach., which however is said to have the margins of the 
du incised and crenate and the apothecia of a wax co- 
our, 
23. USNEA, Ach. 
145. U. florida, Ach.; L. U. p. 620. 
Han. New Zealand and Van Diemen's Land. 
146. U. plicata, Ach.; L. U. p. 622. 
Has. Falkland Islands and Cape Horn. 
147. U. barbata, Ach.; L. U. p. 624. 
His. Lord Auckland’s group, Campbell's Island, Falkland 
Islands, Cape Horn, and Van Diemen's Land. 
148. U. melaxantha, Ach.; L. U. p. 618. 
Has. Falkland Islands and Hermite Island. 
149. U. Taylori, Hook. fil. mst. thallo erecto levi pallide 
citrino dichotomo, ramis erectis gemmis papulosis sparsis, 
apotheciis terminalibus majoribus demum planiusculis 
disco atro-purpureo margine integerrimo extus lavigatis. 
Han. Kerguelen's Land. : ; 
4 inches high, rising from a thick, dark, coriaceous disk ; 
branches cylindrical, acuminated, slightly curved where they 
