Il8 GEOLOGICAL SURVEY OF CANADA, 



Quite common on bark of young red maples in the vicinity of 

 Ottawa, Ont.; on maple trees at Belleville, Hastings Co., Ont ; 

 on bark, Parson's Mountain, near Victoria, Vancouver Island. 

 (Doubtful.) {Macoun) 



Var. atrocinerea, NYL. 



On rocks at Shannonville, Hastings Co., Ont., Oct., 1882. 

 (Macoun) 



Var. confragosa, NYL. 



On maple trees at Belleville, Hastings Co., Ont.; on young 

 poplars, Sea's farm, near Victoria, Vancouver Island, May 22nd, 

 1893. (Macoun.) 



Var. exigua, FR. 



Greenland. (Arct. Man.) On limestone rocks in Rockcliffe 

 Park, and at the Hogsback, 4 miles from Ottawa, Ont., April, 

 1897 ; on old fence-rails at Brighton, Northumberland Co., Ont.; 

 on bark, North Bay, Lake Nipissing ; on poplar bark, Lake 

 Nipigon, Ont.; on green ash bark at Old Wives' Creek, Assa., 

 June, 1895 ; on poplar bark, Jumping Pound Creek, Rocky 

 Mountains, June, 1897 ; on bushes in woods at Comox, Vancouver 

 Island, June 23rd, 1893. (Macoun.) 



253. R. constans, (NYL.) TUCKERM. 



On living and dead wood. 



On bark of living beech at Ottawa, Ont.; on old logs at Has- 

 tings, Burrard Inlet, B.C. (Macoun) 



26. PERTUSARIA, DC. 



254. P. bryontha, (Acn.) NYL. 



On earth, grooving over mosses, in alpine and northern districts. 



Greenland. (Vahl) Growing over mosses, L'Anses au Mort, 

 Labrador. (Waghorne.) Shores of St. Mary's River, Lake 

 Superior. (Richardson) Islands of Behring Strait. (Wright) 



