636 LICHENES ANTARCTICI. 
with obtuse ridges; beneath the lobes the whitish fibres 
are placed in concentric series. Structure of the apothecia 
different from that of its congeners. The lamina colourless 
and transparent, forming a shallow layer in which are per- 
pendicular thece, through the pellucid lamina is seen a dense 
stratum of subjacent orange-coloured matter, which rests on 
green parenchyma continuous with the thallus. 
2. LECIDEA, Ach. 
2. L. atro-alba, Ach.; L. U. p. 162. 
Has. New Zealand and Cockburn Island. 
3. L. geographica, Hook.; Engl. Fl. v. 5, p. 178. 
Has. Falkland Islands and Kerguelen's Land. 
4. L. stellulata, 'Vayl.; in Flor. Hib. p. 118. 
Has. Falkland Islands and Kerguelen's Land. 
5. L. confluens, Ach.; L. U. p. 174. 
Has. Kerguelen's Land and Cape Horn. 
6. L. petrea, Ach.; L. U. p. 155. 
Has. New Zealand. 
7. L. sulphurea, Ach.; Syn. p. 37. 
Han. Falkland Islands. 
8, L. rivulosa, Ach.; Syn. p. 98. 
Has. Kerguelen's Land. 
9. L. marmorea, Ach.; L. U. p. 192. 
Has. New Zealand. 
lU. L. speirea, Ach.; L. U. p. 184. 
Has. New Zealand. 
11. L. geomea, Tayl.; in Flor. Hib. p. 124. 
Has. Lord Auckland’s group and Cape Horn. 
12. L. eleochroma, Ach.; Syn. p. 18. 
Has. Falkland Islands. 
13. L. parasema, Ach.; Syn. p. 17. 
Has. Cape Horn. 
14. L. aromatica, Ach.; L. U. p. 168. 
Has. Kerguelen's Land. 
15. L. pulverea, Borr.; Engl. Bot. t. 2726. 
Has. Falkland Islands. 
