8. C. tristis, (Web.) Fr.

Alpine rocks. Arctic America. (Richardson.) On rocks, Digge's Island, Hudson Strait, 1885. (Dr. R. Be//.) On rocks, summit of

4 1/2

Mount Benson, Vancouver Island (Macoun.) Muir Glacier, Alaska, July 13th, 1897. (T. Kincaid.)

9. C. Californica, Tuckerm.

On trees on the summit of Mount Benson, Vancouver Island, alt. 3,300 feet. (Macoun?)

10. C. aculeata, (Schreb.) Fr

On earth and growing over mosses in alpine districts.

Greenland. (Arct. Man.) Arctic America. (Hooker.) Clearwater Lake, Labrador. (A. P. Low.) On rocks near Halifax, N. S.; on eastern end of Cypress Hills, Assa.; on rocks and earth along the Milk River, Assa., near Kenneday's Crossing; in Crow's Nest Pass and along Jumping Pound and Bragg's creeks, Rocky Mountains; Bow River Pass, Kananaskis Pass and Devil's Lake, Rocky Mountains; on rocks Roger's Pass, Selkirk Mountains, B.C.; on Stewart's Lake Mountain, B.C.; on mountains at Spence's Bridge, B.C.; on rocks Burnside Road, Victoria, and on Mount Arrowsmith, Vancouver Island. (Macoun.) On the Barren Grounds, Lat. 62° 50', Long. 1020 45', W. (/. B. Tyrrell) St. Paul Island, Behring Sea. (J. M. Macoun.)

11. C. odontella, Ach.

Growing over mosses on rocks in Arctic America. (Tuckerman.) Greenland. (Arct. Man) On rocks at Clearwater Lake, Labrador, July 12th, 1896. (A. P. Low.) On earth in Lat. 61° 30', Long. 103o 30', W., July 26, 1893. (J. B. Tyrrell)

12. C. ramulosa, (Hook.) Tuckerm.

Growing over mosses on alpine rocks.

Arctic America. (Richardson) Rocky Mountains. (Herb. Hooker) Digge's Island, Hudson Strait. (Dr. R.Bell) Summit of Mount Niblock near Lake Agnes, Rocky Mountains. (Macoun)

13. C. madreporiformis, (Ach.) Mull.

On earth in alpine districts.

On mountains in Bow River Pass, Rocky Mountains, 1879; on earth, summit of Sulphur Mountain Banff, alt. 7,500 ft., 1891; along Bragg's Creek, Elbow River, Rocky Mountains, 1897, alt 5,000 feet. (Macoun.) The latter specimens have been referred to var. muricata by Dr. Branth.

14. C. arctica, (Hook.) Tuckerm.

Greenland. (Arct. Man.) Clearwater Lake and Whale River, Labrador, 1896. (A. P. Low.) Bear Lake and elsewhere in Arctic America. (Richardson) Cape Prince of Wales, Digge's Island and Upper Savage Islands, Hudson Strait. (Dr. R. Bell) Barren Grounds, Lat. 62° 45', Long. 1030, W. (J. W. Tyrrell) Summit of Mount Niblock, Lake Agnes, Rocky Mountains. (Macoun) Emerald Lake, south of Laggan, Rocky Mountains, alt. 5,500 ft. (Bean) St. Paul Island, Behring Sea, 1891. (J. M. Macoun.)

15. C. Islandica, (Lind.) Ach.

On earth in many places throughout the mountains and cooler parts of Canada.

Western Greenland. (Warming) Greenland. (Arct. Man.) On earth, Baffin Land, north of Hudson Strait, 1896; North Bluff, Hudson Strait. (Dr. R. Bell.) Barren Grounds, Lat. 61°, Long. 104o, W. (J. W. Tyrrell.) Mount Albert, Gaspé Co., Que.; Mount Stewart, Prince Edward Island; on Bruce Peninsula, at Little Eagle Harbour, Ont., August, 1901; quite common along the north and east shores of Lake Superior; on earth in woods, Banff, Mount Aylmer, Devil's Lake and Hector, Rocky Mountains; in Roger's Pass, Selkirk Mountains, B. C.; common on the mountains at the head of the Elbow River and in the Crow's Nest Pass, Rocky Mountains; mountains at Spence's Bridge, B.C.; Gold Range at Griffin Lake and above the Sky Line Mine, Kootenay Lake, B.C.; on earth at Comox, Vancouver Island. (Macoun) On Todd Mountain and on mountains south of Tulameen River, B. C. (Dr. G. M. Dawson) Cape Vancouver and St. Paul Island, Behring Sea. (J. M. Macoun)

Var. crispa, (Ach.)

On earth in alpine and sub-alpine districts. Greenland. (Arct. Man) At the Summit Lake, Manicouagan River, Que. and Whale River, Labrador. (A. P. Low.) Battle Harbour, Labrador. (Waghorne.) On earth Half-Way House, Cape Breton Island, N.S., August, 1898; on earth, Salt Lake, Anticosti, Aug. 10th, 1883. (Macoun)

Var. robusta, (Branth)

St. Paul Island, Behring Sea, July 2nd, 1897. (J. M. Macoun.)

16. C. hiascens, (Fr.) Th. Fr.

Greenland. (Arct. Man.) Arctic America. (Herb. Hooker.) Newfoundland. (Despreaux) North Shore of Lake Superior. (Agassiz.) Nottingham Island and Digge's Island, Hudson Strait; on Baffin Land, north shore of Hudson Strait, July, 1897. (Dr. R. Bell.) On earth, L'Anse au Mort and west of Woodside, Newfoundland. (Waghorne.) Barren Grounds, Lat. 61° 25', Long. 103o 30', W. (/. W. Tyrrell) On earth, Salt Lake, Anticosti; summit of Mount Albert, Gaspé Co., Que. (Macoun) Middleton Island, Alaska, and St. Paul Island, Behring Sea. (J. M. Macoun)

17. C. Richardsonii, (Hook.) Tuckerm.

Prostrate on the ground.

Barren Grounds, north of Great Slave Lake. (Richardson.) On the Barren Grounds near Chesterfield Inlet, Hudson Bay, Aug. 1893. (J. W. Tyrrell.)

18. C. cncullata, (Bell.) Ach.

On earth in alpine and sub-alpine districts.

Greenland. (Arct. Man.) Arctic America. (Richardson) Marble Island, Hudson Bay; Digge's Island, Hudson Strait. (Dr. R. Bell) L'Anseau Mort, Labrador, and Chimney Cove, Newfoundland. (Waghorne) Barren Grounds, Lat.62o 50', Long. 102° 05' W. (/. W. Tyrrell.) Summit of Mount Albert, Gaspé Co., Que.; Sulphur Mountain, Banff and at the source of the Elbow River, Rocky Mountains. (Macoun) On earth, St. Paul Island, Behring Sea. (J. M, Macoun)

19. C. nivalis, (Linn.) Ach.

On earth in alpine and sub-alpine districts.

Greenland. (Arct. Man.) Arctic America. (Richardson) Mansfield Island, Hudson Bay and Nain, Labrador; on earth, Baffin

Land, north of Hudson Strait, 1896. (Dr. R. Bell) L'Anse au Loup, Labrador; and Chimney Cove, Newfoundland. (Waghorne.) Clearwater Lake and Whale River, Labrador, July, 1896 and 1898. (A. P. Low.) Barren Grounds, Lat. 62o 03', Long. I03o 15', W. (J. B. Tyrrell.) Parry Falls, Great Slave Lake, May 15th, 1900. (/. W. Tyrrell.) Fort Good Hope, Mackenzie River. N.W. T. (R. G.McConnell.) Thirty miles north of Arctic Circle on Peel River. (Miss E. Taylor.) Summit of Mount Albert, Gaspé Co., Que.; on the east end of Cypress Hills, Assa.; Bow River Pass, and on earth in woods at Banff and at the source of the Elbow River, Rocky Mountains. (Macoun.) Crow's Nest Pass, Rocky Mountains; on mountains south of Tulameen River and on Todd Mountain, B.C. (Dr. G. M. Dawson.) St. George and St. Paul islands, Behring Sea. (J. M. Macoun)