122 GEOLOGICAL SURVEY OF CANADA, 



28. GYALECTA, (Ach.) Anzi. 



270. G. lutea, (DICKS.) TUCKERM. 



On bark of trees. 



On hemlock bark at Beechwood, Ottawa, Ont.; on spruce bark 

 along the Red Deer River, Porcupine Mountains, Man. (Macoun) 



271. G. Pineti, (SCHRAD.) TUCKERM. 



On bark and rotten wood at the base of trees. 

 On dead wood in woods, Sudbury Junction, Ont., May 29th, 1884. 

 (Macoun.) 



272. G, rhexoblephara, (NYL.) TUCKERM. 



On earth, growing over mosses, &c. 



Greenland. (Vahl.) Islands of Behring Strait. (Wright.) 



29. URCEOLARIA, Tuckerm. 



273. U, scruposa, (LINN.) NYL. 



On rocks and on earth and often growing over mosses. 



On earth, Labrador or Newfoundland with var. bryophila, Eschw. 

 (Waghorne fide Eckfeldt.) Arctic America. (Richardson.} On 

 rocks, Lake Nipigon, Ont.; on the prairie north of Cypress Hills, 

 Assa. ; common on earth along Old Wives' Creek and south of 

 Wood Mountain, Assa.; on earth and roots along Jumping Pound 

 Creek, Rocky Mountains, June, 1897 ; on earth at Revelstoke and 

 Deer Park, Columbia River, B.C.; on earth in Roger's Pass, Sel- 

 kirk Mountains, B.C. (Macoun} Alaska. (Rothrock) 



30. THELOTREMA, (Ach.; Eschw. 



274. T. lepadinum, (Acn.) 



On bark of trees and dead wood. 



On bark of trees, Labrador or Newfoundland. (Waghorne fide 

 Eckfeldt.) Arctic America. (Richardson.) On ash trees at Ot- 

 tawa, Ont.; on Douglas fir, Victoria, Vancouver Island and on 

 Alnus rubra at Comox, and Alberni, Vancouver Island. (Macoun) 



