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 frpm 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 5 o" poplar bark, Jumping Pound Creek, Rocky 

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

 Island, June 23r'd, 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. (Ach.) Nyl. 



On earth, grow^ingover 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.) 



