28 OTTO VERNON DARBISHIRE, (Schwed. Südpolar-Exp. 
Placodium D. C. 
Placodium ambitiosum nov. spec. 
Description: p. 8, pl. 1, fig. 13. 
Locality: Falkland Islands* (gfr.). — On stone. 
Placodium elegans (LinKk.) NyL. — TH. FR. Lich. Scand. p. 168. 
Literature: BLACKMAN Ant. p. 320. — DARBISH. Fram, p. 30. — DarBIst. Nat. Ant. p. 4. — DARBISH. 
Ork. p- 3. — Nyr. Fueg. p. 27. 
Amphiloma elegans v. granulosum SCHAER. — MÜLL. Austr.-Georg. p. 323. 
Caloplaca elegans (LINK) TH. Fr. — TH. Fr. Lich. Scand. p. 168. — HELLE. N. Z. p. 66. 
Lecanora elegans ACH. — CROMB. Kerg. p. 184. 
Distribution: In arctic and alpine regions all over the world. 
Localities: Tierra del Fuego (1fr., 4); South Georgia (13a, fr.); Graham Land (22, 
28, 30, fr., 34, fr.). — On stone, generally in fruit. 
Placodium lucens NyL. — Wain. Belg. p. 23, pl. I, fig. 4. 
Literature: 
Caloplaca lucens (NyL.) A. ZAHLBR. — A. ZAHLBR. Gauss, p. 29 et 50. 
Lecanora elegans f. lucens NyL. — CROMB. Kerg. p. 184. 
Lecanora murorum ACH. v. farcla. — Hook. F]. Ant. II, p. 535. 
Caloplaca elegans (Link) TH. Fr. f. farcta BaB. — TH. Fr. Lich. Ant. p. 208. 
Distribution: Kerguelen and Cape Horn. 
Localities: Tierra del Fuego (4); Falkland Islands (8). — On stone, always in fruit. 
Placodium miniatum Hrrım. — TH. FR. Lich. Scand. p. 170. 
Literature: DARBISH. Fram, p. 30. 
Caloplaca murorum v. miniala (Hrrm.) TH. Fr. — TH. Fr. Lich. Scand. p. 170. — HELLE. N. Z. p. 68. 
Lecanora miniata ACH. — Hook. Fl. II, p. 535. 
Distribution: America, Europe and New Zealand. 
Localities: Falkland Islands* (9); South Georgia (13); Graham Land* (28, 30, 31). — 
On stone, in fruit. 
Placodium murorum (HFFım.) D. C. -- Th. FR. Lich. Scand. p. 170. 
Literature: DARBISH. Fram, p. 30. — DARBISH. Nat. Ant. p. 4. — Warn. Belg. p: 23. 
Caloplaca lobulata (SMRFT.) TH. FR. — HELLe. N. Z. p. 67. 
Caloplaca murorum (HFrm.) Tu. FR. — TH. Fr. Lich. Scand. p. 170. — Herıe. N. Z. p. 68. 
Lecanora murorum ACH. — Hook. Fl. Ant. II, p. 535. 
Distribution: Cosmopolitan. 
Localities: South Georgia* (12); South Shetland Islands* (21); Graham Land (22, 
28). — On stone, in fruit. 
Placodium regale WAın. — Waın. Belg. p. 23, pl. I, fig. 1—2. 
Literature: 
Polycauliona regalis (Waın.) HUE. — DARBISH. Nat. Ant. p. 4. — HUE Charcot, No. 7. 
Placodium fruticulosum DARBISH. — DARBISH. Ork. p. 3, pl. 3. 
Distribution: In the Antarctic region only. 
Localities: South Shetland Islands (21); Graham Land (28). — On stone, in fruit. 
