150. c. myriococcum, Ach.

On moss on rocks in a ravine at Margaree, Cape Breton Island, N.S., July, 1898; growing over mosses on limestone rocks, Rock-cliffe Park,Ottawa, Ont.; on perpendicular cliffs, King's Mountain, near Chelsea, Que., 1897; at Lake Nipigon, Ont. (Macoun.)

151. C. pycnocarpum, Nyl.

On trunks, Durham, Que. (A. T. Drummond.) On trunks in woods, Brighton, Northumberland Co., Ont., 1893. (Macoun.)

152. C. cyrtaspis, Tuckerm.

On earth at Revelstoke, B.C., May 5th, 1890; on earth, Spence's Bridge, B.C., May 30th, 1889. (Macoun.)

153. C. leptaleum, Tuckerm.

On trees at Truro, N.S., June, 1883; on ash trees in a swamp at Baddeck, Cape Breton Island, N.S., July, 1898. (Macoun.)

154. C. flaccidum, Ach.

On rocks and trunks. Greenland. (Branth.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On trunks, Tadousac, Que. (A. T. Dnimmond.) On spruce trees, Salt Lake, Anticosti; on earth Gaspé Basin, and along Ste. Anne des Monts River, Gaspé Co., Que.; on trees, Sudbury Junction and on rocks, Lake Nipigon, Ont.; on trunks in woods, Seymour West, Northumberland Co., Ont.; on rocks at Morley, Rocky Mountains; on trees at Revelstoke, Columbia River, B.C.; on rocks at Spence's Bridge and Agassiz, B.C.; on bark of trees, Burnside Road, Victoria, Vancouver Island. (Macoun.)

155. C. nigrescens, (Huds.) Ach.

On trees. Greenland. (Lindsay.) On bark of ash trees, Ste. Anne des Monts River, Gaspé Co., Que.; on ash trees in a swamp at Baddeck, Cape Breton Island, N.S., July, 1898; on trees in Algonquin Park, Ont., June, 1900; on trees at Sudbury Junction, Ont.; ash trees, Blackwater River, Lake Nipigon, Ont.; on rocks, Deer Park, Lower Arrow Lake, Columbia River, B.C., June 8th, 1890. (Macoun.)

156. C. pulposum, (Bernh.) Nyl.

On earth, Greenland. (Branth.) On earth at Tadousac, Que. (A. T. Drumrnond.) On earth, Ste. Anne des Monts River, Gaspé Co., Que.; on limestone rocks, Rockcliffe Park, Ottawa, Ont.; on earth at Belleville, Hastings Co., Ont.; on the bases of trees, Seymour, Northumberland Co., Ont.; on calcareous earth along Old Wives' Creek, Assa., 1895; on earth, Kananaskis Falls and Jumping Pound Creek, Rocky Mountains; on earth at Revelstoke, Columbia River, B.C.; Telegraph Trail, west of Quesnel, B.C.; on earth at Victoria, Vancouver Island. (Macoun.) Cape Lisburne, Alaska. Rothrock.)

157. C. tenax, (Sw.) Ach.

On earth in calcareous soils.

On earth west of Hull, Que., and in Rockcliffe Park, Ottawa,Ont.; on limestone rocks along the Moira River at Belleville, Ont.; on rocks at Port Arthur, shore of Lake Superior; on earth, Cypress Hills, Assa.; on earth at Otterburne, Manitoba. (Macoun.)

158. C. crispum, Borr.

On earth, Canada. (A. T. Drummond.) On calcareous earth, west of Hull and on King's Mountain near Chelsea, Que.; on earth at Quesnel, B.C., June, 1875. (Macoun.)

159. C. limosum, Ach.

On calcareous earth in a cutting west of Hull, Que.; very rare; on earth in wet soil at Morley, Rocky Mountains; on earth on wet rocks near Victoria, Vancouver Island. (Macoun.)

160. C. melsenum, Ach.

Calcareous and other rocks.

Greenland. (Vahl.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On rocks, Lake Nipigon, Ont., July 9th, 1884. Named by Tuckerman. (Macoun.)

Var. polycarpum, Schaer. Islands of Behring Strait. (Wright.)

161. C. multipartitum, (Sm.) Tayl.

On calcareous rocks near Stewart's Lake, northern British Columbia, June 25th, 1875. (Macoun.)

162. C. furvum, (Ach.) Nyl.

On calcareous rocks.

L'Anse au Mort, Labrador. (Waghorne.) On rocks, Tadousac, Que. (A. T.Drummond.) Along the shores of Lake Nipigon, Ont.; on stones, Cypress Hills, Assa; found also in Canada by Tuckerman. (Macoun.)

163. C. pustulatum, Ach.

Calcareous rocks, Rocky Mountains, Lat. 54°-56°. (Drummond.) On calcareous rocks along Jumping Pound Creek, Rocky Mountains, June, 1897; on bark of trees, Burnside Road, near Victoria, Vancouver Island, May 10th, 1893. (Macoun.)

164. C. floculosa, Nyl.

On limestone rocks below Governor's Bay, Rockcliffe Park, Ottawa, Ont.; on naked limestone rocks in woods south of the Aylmer Electric Railway, west of Hull, Que.; very rare, May 16th, 1896. (Macoun.)