Bd. IV: ır) THE LICHENS. 33 
Cetraria islandica (L.) AcH. — TH. FR. Lich. Scand. p. 98. 
Literature: DARBISH. Fram, p. 37. — Hook. Fl. Ant. II, p. 523. 
Distribution: North and south America and Asia; Europe. 
Locality: South Georgia* (16). — Over earth, sterile. 
Cetraria ulophylla Acu. — TH. FR. Lich. Scand. p. 107. 
Literature: Platysma wlophyllum ACH. — CROMB. Fueg. p. 228. — Nyr. Fueg. p. 25. 
Cetraria saepincola (EHRH.) ACH. v. chlorophylla (klumB.) SCHAER. — TH. Fr. Lich. Scand. p. 107. 
Distribution: Southern America; Europe, 
Locality: Tierra del Fuego (1). — Between moss and lichens on Nothofagus 
betuloides. 
Letharia (TH. FR.) A. ZAHLBR. 
Letharia Poeppigii (NEES et FLOT.) NyrL. — Nyr. Syn. Lich. I, p. 275. 
Literature: Chlorea Poepßigii (NEEs et FLoT.) NyL. — CROMB. Fueg. p. 227. — NyL. Fueg. p. 5. — Nyr. 
Syn. Lich. I, p. 275. 
Evernia magellanica MoNT. — Hook. Fl. Ant. II, p. 522. — Mütr. Gaz. I, p. 54. 
Usnea Poeppigii (NEES et FLor.) Warn. — Waın. Belg. p. 12. 
Distribution: South America only. 
Locality: Tierra del Fuego (I, 2, 7). — Sterile between moss, on trees. 
Usnea (Dırr.) Acn. 
Usnea cavernosa TUck. — TUckK. N. A.L. I], p. 43. 
Literature: Waın. Belg. p. 10. 
Usnea lacunosa NyL. — CROMB. Fueg. p. 227. — Mürr. Mag. p. 151. — Mürr. Speg. No. 19 
(= Letharia Poeppigii sec. MÜLL.-ArG.). — Nyr. Fueg. p. 25. 
Distribution: North and south America; Australia and southern Asia. 
Locality: Tierra del Fuego (4). — On trees, sterile. 
Usnea xanthopoga NyL. — HUE Lich. Extra. No. 122. 
Literature: Nyr. Fueg. p. 4. 
Distribution: Southern America only. 
Localities: Tierra del Fuego (I, 4). — On trees, sterile. 
Neuropogon NEES et FLOT. 
Neuropogon melaxanthum (AcH.) NyL. — NyL. Syn. Lich. I, p. 272. 
Literature: DARBISH. Fram, p. 38. — DaArBIsH. Nat. Ant. p. 7. — MüLr. Austr.-Georg. p. 323. 
Usnea melaxantha AcH. — DaARrBIsH. Ork. p. 2. — Hook. Fl. Ant. II, p. 519. — HuE Charcot 
No. 5. — Müır. Mag. p. 152. — Müur. Speg. No. 22. 
Neuropogon sulphureus KoEnIG. — HELLE. N. Z. p. 21. 
Usnea sulphurea (KoENIG) TH. Fr. — Tu. Fr. Lich. Ant. p. 208. — Waın. Belg. p. II. — ZAHLBR. 
Gauss, p. 49 & 52. 
Usnea barbata AcH. v. sulphurea (?). — Hook. Fl. Ant. I, p. 194. 
»Neuropogon Taylori NyL.». — BLACKMAN Ant. p. 320 (sec. DarBısH. Nat. Ant. p. 7). 
Distribution: Arctic, alpine and southern America; Australia and New Zealand. 
5—112865. Schwedische Südpolar-Expedilion 1901—-1903. 
