^2 GEOLOGICAL SURVEY OF CANADA. 



Algonquin Park, Ont., 1900 ; on rocks, C^che Lake, Algonquin 

 Park, Ont.. July, 1900 ; on rocks, Nipigon River, Ont. ; on rocks, 

 Blackwater River, B.C.; on alders, Hastings, B.C., 1889. {Maconn.) 

 A form found on Ahius incatia and on fences, with us, always 

 infertile, is placed under var. sorediata because the specimens are 

 more or less sorediate, with white powdery granules on the mar- 

 gins of the divisions of the thallus. 



64. P. stygia, (Linn.) Ach. 



Alpine and subalpine rocks. 



Greenland. {Bra?ifh.) Arctic America. {Richardson.) New- 

 foundland. {Pylaie.) Labrador. {Waghorne^ On rocks, Ta- 

 dousac. Que. (A. T. Drmn?nond) On rocks. Deer Park, Columbia 

 River, B.C., 1890 ; on sandstone rocks along Jumping Pound 

 Creek, Rocky Mountains, June, 1897. {Macoun.) 



65. P. lanata, (Linn.) Wallr. 



Greenland. {Branth.) Arctic America. {Richardson^ Mel- 

 ville Island. {R.Brown.) Labrador. (Waghorne) On the sum- 

 mit of Mount Benson, alt. 3,000 feet, Nanaimo, Vancouver Island, 

 July lOth, 1893. {Macoun.) 



66. P. caperata, (Linn.) Ach. 



Trunks, dead wood and stonts, quite common. 



On old rails, Canaan Forks, Queen's Co., N.B. (/. Moser.) 

 Arctic America. {Richardson.) On trees, Tobique River, N.B. 

 {G. U.Hay.) On Rigaud Mountain, Vaudreuil Co., Que. {Rev. G. 

 Dticharme) On old fences around Ottawa, Ont.; at Belleville, 

 Brighton and Nipigon River, Ont.; on tru ks at Jordan Station, 

 Lincoln Co., Ont., May 17th, 1901 ; on basswood trees at Guelph, 

 Ont., 1898 ; on trunks, Algonquin Park, Ont., 1900 ; on dead 

 wood, Manitoba House, Man.; on dead wood at Morley, Rocky 

 Mountains. {Macou7i.) On board fences at Edmonton, Ont. 

 {James White.) 



67. P. conspersa, (Ehrh.) Ach. 



On rocks and stones and sometimes on dead wood. 

 Greenland. {Branth.) Arctic America. {Richardson.) Labra- 

 dor. {Waghorne.) On rocks. Barren Grounds, Lat. 61°, Long. 



