370 DE. LATJDER LINDSAY OJS^ THE 



m ^ 



3. Pyrenopsis Ticematopis^ Smrf. Saxicolous. Havnafjord. 



4. Sphceroplioron coralloides, Pers. Sterile, in dwarf tufts, of a 



brownisli colour, and resembling some forms of Cetraria 

 actcleata: accom^^anying Cladoiiia i^angiferina, (7. nnciaUs,&c. 



5. Stereocaidon pascJuiJe, Laur. Various forms, saxicolous, ste- 



rile: also Thingvalla, 1855, J. Hcwat, in Herb. UniA^ 

 Edinb. 



6. S, denudafuniy Flk. Common, frequently sterile. 



7. >S'. condensatum, Hffm. 



8. Vsnea barhata^ Fr., var. ceratina^ Acli. i^Jlde Nyl. Licli. Scand. 



p. 69). 



9. JRamalina scopidoricm^ Ach. Videy. Very like a saxicolous 



rigid form of B. calicaris^ Fr., y2.v.farinacea^ Acb. ; passes 

 into 



10. JR. polymo}p1ia^ Ach., var. capitata^ Acli. (i?. tinctoria, Scha^r.). 



Videy. 



11. Cetraria Islandlca, Ach., and var. crispa^ Ach. : botb very com- 



mon. 



12. G. aculeata^ Fr., and var. muricata, Ach. : both very common. 



13. Platysma nivale, L., various forms. Very common ; sometimes 



covers considerable tracts of ground, like Cladonia rangi- 

 ferina : usually sterile, dwarf, and deformed. 



14. P. ciicuUatum, Hffm. Terricolous : sometimes accompanying 



the preceding. 



15. Peltigera canina, Hffm. Sterile and miserable specimens. 



16. Farmelia saxatilis, Ach. Saxicolous, very common : stcrue 



about Reykjavik. 

 Var. ompJialodes, Ach. Thallus sometimes deep purplish, -with 

 a beautiful peach-coloured bloom, especially about its peri- 

 phery. 



17. P. la?iata, L. In hollows of boulders, Laugarness moors. 



18. Physcia parietina, L. Saxicolous : common on walls about 



Eeykjavik ; and on marine rocks, Videy. 



19. P. stellar is ^Yv.^ var. acrita, Ach. (var. aipolia^Ach,). Musci- 



colous, Laugarness moors. 



Vars. Jeptalea, Ach., and tenella, Ach., and other forms : all saxi- 



colous and more or less common, generally sterile. 



20. P. cccsia, Hffm. Abundant on walls about Eeykjavik : sterile. 



21. UmhiUcaria prohoscidea, DC. A specimen in Herbarium, KeW, 



labelled "Iceland, Mr. Paulsen, 1809," possesses some of 

 the characters rather of Z7. cylindrica on the one hand and 

 U, hirsuta on the other. The thallus is of a very pale grey 

 colour, provided with short marginal and rhizinal fibre?, 



t 





