Bd. IV: ı1) THE LICHENS. 23 
Diplotomma Fw. 
Diplotomma alboatrum (Hrrm.) Ti. Fr. — Tu. FR. Lich. Scand. p. 607. — 
Literature: DARBISH. Fram, p. 22. — HELLe. N. Z. p. 117. 
Distribution: Northern Africa and America; New Zealand; Europe. 
Locality: South Shetland Islands* (21); Graham Land* (22). — On stone, in fruit. 
Rhizocarpon RAnm. 
Rhizocarpon geminatum (Fw.) Ti. Fr. — TH. Fr. Lich. Scand. p. 623. 
Literature: DARBISH. Fram, p. 23. 
Lecidea concreta (AcH.) Wan. f. geminata (FLor.) Warn. — Wan. Belg. p. 31. 
Rhizocarpon Montagnei KrB. — HELLE. N. Z. p. 119. 
Distribution: Arctic America and Asia; Eastern Africa; Europe; New Zealand; Antarctis. 
Localities: Falkland Islands* (9); Graham Land (30). — On stone, in fruit. 
Rhizocarpon geographicum (L.) D. C. — TH. Fr. Lich. Scand. p. 622. 
Literature: DARBISH. Fram, p. 23. — DARBISH. Ork. p. 2. — DARBISH. Nat. Ant. p. 2. — HELLE. N. Z. 
p- 118. — MÜLL. Austr.-Georg. p. 327. — MüLr. Beitr. No. 999. — Mürr. Speg. No. 97. — 
ZAHLBR. Gauss, p. 41. 
Lecidea geographica (L.) SCHAER. — BLACKMAN Ant. p. 320. — CroMB. Kerg. p. 191. — Hook. Fl. 
Ant. II, P. 539. — HUuE Charcot, No. 16. — Warn. Belg. p. 31. 
Distribution: An arctic and alpine cosmopolitan plant; Antarctis. 
Localities: Falkland Islands (8, 9); South Georgia (13a, I4, 17, 20). — On stone, in 
fruit. 
Gyrophora Acı. 
Gyrophora anthracina (WULF.) Kr. — TH. Fr. Lich. Scand. p. 165. 
Literature: DARBISH. Fram, p. 24. — Darpısı. Nat. Ant. p. 3. 
Umbilicaria leiocarpa D. C. — Wann. Beleg. p. 9. 
Distribution: Arctic and alpine portions of America and Europe; Antarctis. 
Localities: Graham Land (28, 32, 34). — On stone. 
Gyrophora Dillenii Tuck. — TucK. N. A. L. I. p. 37. 
Literature: DARBISH. Nat. Ant. p. 3. 
Umbilicaria Dillenii Tuck. — HuE Charcot, No. 12. — Tuck. N. A. L. I. p. 87. — Waın. Belg. p. 9. 
Distribution: Northern America; Antarctis. 
Localities: Graham Land (25, 28). — On stone. 
Stereocaulon SCHREB. 
Stereocaulon alpinum LAURER. — TH. FR. Lich. Scand. p. 48. 
Literature: DARBISH. Fram. p. 25. — Hook. Fl. Ant. II, p. 529. 
Distribution: Arctic ard Southern America; Mexico; Northern Asia; Alpine Europe. 
Locality: South Georgia* (13a, 14, 15, 17 fr., 18). — Over earth and moss. 
