188 THE EEV. W. A. LEI&HTON ON LlCHEIfS 



F* decorticata. Podetia elongated, cylindrical, white, decorticate, squa- 

 moso-exasperate (transitus in cariosam). 



C. CHLoBOPH^A, Flk. Podetia pulverulent, granules coarser at the base, 

 sulphury-yellow (transitus in Jimbriat am). 



C. FiMBBlATA, Hqfm. Podetia elongate, cylindrical, clothed entirely 



with a very fine white dust. 



Forma conista, Podetia short, subturbinate, scyphi cyathiform, simple; 

 margin entire. 



F. tubcBformis. Podetia elongate, cylindrical ; scyphi regular ; margins 

 entire. 



F. denticulata, similar to tubaformis in shape, but margins of scyphi den- 

 ticulate. 



F. carpopkora. Similar to tubaformis in shape, but margins of scyphi 

 bearing apotbecia. 



¥. fibula. Podetia long, subcylindrical ; scyphi narrow or none; apo- 

 tbecia sessile, congested. 



F. abortiva. Podetia elongated obtuse, or obscurely scyphiferous, more 

 or less squamose. 



F, prolifera. Scyphi proliferous. 



F. radiata, Podetia elongated ; margins of scyphi more or less variously 

 radiate. 



■ 



F, cornuta, Podetia elongated, subuliform, simple or branched, 



F, nemoxyna, Podetia long, branched, branches divided, subuliform.J 



C. GRACILIS, Hqffm, 

 No. 13, Forma subulata, Dill, xiv. fig. 13 c {gracilis, Ach. Syn.). 

 Hab. Great Bear Lake. 



No. 14. Forma podetiis ascyphis et scyphis simplicibus, 

 Hab. Great Bear Lake. 



No. 15. Forma scyphis simplicibus. 



Hab. Great Bear Lake ; Great Slave Lake, 



No. 16. Forma scyphis proliferis. 

 Hab. Great Bear Lake. 



No. 17- Forma podetiis basi infuscatis. 

 • Hab. Great Bear Lake. 



C, cornuta. Fr. 



No. 18. Pormse subulata, scypkophoruy et radiata. 

 Hab. Great Bear Lake. 



C. degenerans, Flk. 



No, 19. Forma haplotea, Ach. (Nyl Syn. 200). 

 Hab. Great Bear Lake. 



No, 20. Forma euphorea, Ach. (Nyl.). " Podetiis efoliolosis vix vd o^' 

 solete albo-punctatis," Vergens ad CL gracilem. 

 Hab. Great Bear Lake. 



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