40S "OR. Ii-VUBKU LINDSAY OX THE 



in Europe pat^ses through Southern Norway, and includes most 

 of the logalities of my collections *. While Sir John Eichard^on*s 

 collections include genuine alpines such as : 



1. Thamnolia vermictdaru, L. 



2. Alectoria ocJiroleuea, Ehrh. 



3. Platijsma cticuUatum, Hffm. 



4. ParmeJia stygia, Ach. 



5. P. Janata^ L. 



6. Umhilicaria erosa, Hffm. 



7- U. vellea^ Ach. 



8. Lecanora oreina, Ach. 



9. L. verrucosa, Laur. 



10. L.fulvo-hitea, Nyl. 

 it also includes such common lowland forms, albeit they are 

 cosmopolites, or very widely distributed over the globe, as : 



11. Usnea harhata^ Fr-, and its vars. Mrfa, L., ^licata, L., and 



ceratina^ Ach. 



12. Uveniiaprunastri J Ach. 



13. Mamalina calicaris, Pr., and YW^farinacea, L. 



14. Peltigera canina^ Hffin. 



15. ParmeJia saxatilis^ Ach. 

 10. P. olivacea, Ach. 



17. Phi/scia ^uJvertilentaj Fr. 



18. P. cassia, Hffm. 



19. P. olscura, Fr. 



20. Sqiiamaria sajcicola, Poilich. 



21. Placodium elegans, DC. 



22. Lecanora vitellina, Ach. 

 . 23. L. glaucoma^ Ach. 



24. Zecidea geograj>7iica,Sch, 



25. Z. disciforiniSy Fr. 



26. Verrucaria epidermidis^ Ach. 



K we substitute the more arctic collections of Dr. Walker, frour 

 latitude 72° in Greenland and America f, for those of Sir John 

 Eichardson, the number of lichens which also occur in my Ic^' 



* The presence of trees and slimbs in the regions visited by Sir Jolin givea 

 tliein a great advantage over treeless countries, Uke Iceland and Faro, as regards 

 tlie comparative riclmeaa of their lichenose vegetation. 



t "An Account of the Plants collected by Dr. Walker m Greenland an^ 

 Arctic America during the Expedition of Sir Francis M'^Clintock, E-IS^, ia ^^® 

 yacht * Fox; " by Dr. Hooker— Journal of the Linnetm Society, (Botany) vol v. 

 p. 87 (Lichena detcnnined by Mr. Mitten). 



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