22. M. pubescens, (Schrank) Raddi.

British Columbia. (Lyall.) Alaska. (Krause.) On boulders at Kicking Horse Lake, Rocky Mountains, B.C.; on rocks in the Coast Range above Yale, B.C., May 17th, 1875; on trees at Hastings, Burrard Inlet, B.C., 1889. (Macoun.) On shaded rocks, Chilliwack River, B.C., 1901. (/. M. Macoun.) Gold Creek near Juneau, Alaska. (Miss G. Cooley.) On rocks at Canon City, Alaska, March 27, 1898. (Williams.)

23. M. myriopoda, Lindb.

On damp rocks near Ironsides, Que., 5 miles from Ottawa, Ont., Oct. 21st, 1884. (Macoun)

24. M. conjugata, Lindb.

On stones in McKay's woods at Ottawa, Ont., Oct. 9th, 1884; on rocks at Cāche Lake, Algonquin Park, Ont., June 9th, 1900; on Acer circinatum at Hastings, Burrard Inlet, B.C.; on damp rocks at Goldstream, near Victoria, Vancouver Island and at Qualicum and Comox, V.I. (Macoun) Blankensof Bay, V.I. (Dr. G. M. Dawson.)

25. M. hamata, Lindb.

. Gold Creek near Juneau, Alaska. (Miss G. Cooley.)