276. s. coralloides, Fr.

Greenland. (Arct. Man.) On rocks, Arctic America. (Herb. Hooker.) At Nain, Labrador, and on Digge's Island, Hudson Strait, 1884. (Dr. R. Bell.) On rocks near Whale River and at Clearwater Lake, Labrador, 1898. (A. P. Low.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.) Barren Grounds, Lat. 61°, Long. 104o, July 24th, 1893. (J. B. Tyrrell) On rocks, Tadousac, Que. (A. T. Drummond) On Mount Aylmer, Devil's Lake, Rocky Mountains, alt. 8,000 feet; common on rocks at Victoria, Vancouver Island. (Macoun.) Unalaska Island, Behring Sea. (J. M. Macoun.)

2V7. S. paschale, (Linn.) Fr.

On earth and stones quite common.

Greenland. (Arct. Man.) Arctic America. (Herb. Hooker.) On rocks, Baffin Land, Hudson Strait, 1897. (Dr. R. Bell.) Indian Harbour and Eagle River, Labrador. (Waghorne) On rocks, Tadousac, Que. (A. T. Drummond.) Rocky islands, Stony Lake, Peterborough Co., Ont. (Titos. Walker.) On rocks, Savanne, west of Lake Superior. (W. Mclnnes) On boulders in woods at Mar-garee, Cape Breton Island, N.S., July, 1898; on earth, Tobique River, N.B.; along the Ste. Anne des Monts River, Gaspé Co., Que.; rather frequent on boulders around Ottawa, Ont.; on boulders, Algonquin Park, Ont., July, 1900; quite common on rocks, Thunder Bay, Lake Superior; on rocks and earth, Hastings, Bur-rard Inlet, B.C.; on Mount Benson near Nanaimo, Vancouver Island. (Macoun.) On rocks, Thurlow Island, Gulf of Georgia, B.C. (Dr. G. M. Dawson) On rocks, Kingston Mills, Ont., Sept. 23rd, 1901; on St. George and St. Paul islands, Behring Sea, and Kadiak Island, Alaska. (J. M. Macoun) Kotzebue Sound, Alaska. (Turner.) Common everywhere in Alaska. (Rothrock)

278 S. tomentosum, (Fr.) Th. Fr.

On earth and stones.

Greenland. (Arct. Man) Arctic America. (Richardson) Indian Harbour, Labrador; Birchy Cove, Clark's Brook, Bay of Islands,

Newfoundland. (Waghorne.) On stones at Lancaster, and on earth along the Tobique River, N.B. (G. U. Hay.) On rocks, Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.) On boulders at Baddeck, Cape Breton Island, N.S., July, 1898; on stones at Truro, N.S.; on stones along Jupiter River, Anticosti, Que.; on rocks, Cape Rosier, Gaspé Co., Que.; on stones at Ottawa, Ont.; on rocks, Lake Superior and on earth at Lake Nipigon; on rocks in woods at Banff, Jumping Pound Creek, Bragg's Creek and Castle Mountain, Rocky Mountains; on rocks near McLeod's Lake, B.C.; on rocks at Hot Springs, Kootenay Lake, B.C.; on rocks, Salt Spring Island, Gulf of Georgia; on rocks at Victoria, Vancouver Island. (Macoun.) Rocky Mountains. (Bourgeau.) Mountains east of Adam's Lake, B.C. (Dr. G. M. Dawson.) Chil-liwack Valley, B.C., 1901. (J. M. Macoun.) Alaska. (Dr. Kellogg.) Sheep Creek, near Juneau; Davidson Glacier, Alaska, (Miss G. Cooley.)

Var. alpinum, Th. Fr.

Greenland. (Vahl.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.) Arctic America. (Richardson.) Islands of Cumberland Gulf. (Howgate.) Islands of Behring Strait. (Wright)

219. S. denudatum, (Floerk.)

On rocks, Greenland. (Dall.) North Bluff and Nottingham Island, 1885. (Dr. R. Bell.) On rocks, Clearwater River, Labrador, July, 1896. (A. P. Low.) Venison Tickle, Eagle River and Indian Harbour, Labrador. (Waghorne.) Newfoundland. (Des-preaux.) Summit of Mount Albert, Gaspé Co., Que. (Macoun.) Alaska. (Dr. Kellogg.)

280. S. condensatum, Hoffm.

On rocks, Clearwater Lake, northern Labrador, July, 1896. (A. P. Low.) On rocks, Baffin Land, July, 1897. (Dr. R. Bell.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.)

281. S. pileatum, (Ach.)

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On stones along Jupiter River, Anticosti, Aug., 1883; on boulders at Baddeck and Margaree, Cape Breton Island, July, 1898. (Macoun.)

282. S. Wrightii, Tuckerm.

On rocks, islands of Behring Strait. (Wright.)

283. S. nanum, Ach.

On rocks, Parson's Mountain, near Victoria, Vancouver Island, May 19th, 1893. These specimens are depauperate and quite white.

284. S. nanodes, Tuckerm.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.)