44 GEOLOGICAL AND NATURAL HISTORY SURVEY OF CANADA. 



35. DIDYMODON, Hedw. 



(160.) D. rubellus, Bruch & Schimp. ; Lesq. & James, Mosses of 

 N. America, 104 ; Canadian Musci, No. 63. 



Weisda curvirostra, Drumm. Muse. Bor.-Am., No. 71. 



Veiy common in the country extending from Canada to the Rocky 

 Mountains. (Drummmd.) On the ground, Truro, N.S. {Fowler's Cat.) 

 On rocks and earth, Tobique Eiver, N.B. (Say.) On rocks, Canaan 

 Forks, Queen's Co., IST.B. (J. Moser.) On rocks, South West 

 Point, Anticosti ; rocks at Campbellton, N.B. ; on rocks, Truro, 

 N.S. j on damp rocks, Gasp^ Co., Que. ; on rocks, McKay's woods, 

 Ottawa, at Belleville, Owen Sound, Port Dover and Niagara Falls, 

 Ont. ; on rocks at Kakabeka Falls, Kaministiquia Eiver, Lake 

 Superior ; on earth. Lake Winnipegoosis, Man. ; on rocks, Cypress 

 Hills, Alberta ; rocks at Morley, Banff and Hector, Eocky Mountains ; 

 at Eevelstoke, Deer Park and Sproat, Columbia Eiver; at Spence's 

 Bi'idge and Lytton, B.C. ; and frequent on Vancouver Island. (Macoun.) 

 Jakobshavn, Greenland. (E. Brown.) Near London, Ont. (J. Dear- 

 ness.) 



(161.) D. Canadensis, Kindb. (n. sp.) 



Differs from D. rubellus principally in the perichetial leaves being 

 thinner, from the ovate base, abruptly attenuate to a short subulate 

 acumen ; borders not reflexed ; basal cells very long ; costa thinner. 

 Dioecious. 



On perpendicular rocks, head of Lake Louise, Eocky Mountains, 

 Aug. 18th, 1891. {Macoun.) 



(162.) D. luridus, Hornsch. ; Lesq. & James, Mosses of N. Ame- 

 rica, 104 ; Canadian Musci, No. 64. 



B. trifarium, Drumm. Muse. Bor.-Am., No. 120. 



About the Falls of Niagara. [Drummond.) Abundant on limestone 

 ledges and great boulders at Jones Falls, near Owen Sound ; on 

 limestone boulders below the Clifton House, Niagara Falls ; on rocks 

 at Hector, Eocky Mountains. (Macoun.) 



(163.) D. rufus, Lorentz ; Greenland Flora, 384. 



Greenland. (Fl. Or.) 



