(304.) A. Lapponicum, Schimp.; Lesq. & James, Mosses of N. America, 158; Canadian Musci, No. 110.

Gymnostomum Lapponicum, Drumm. Musc. Bor. - Am., No. 28. Didymodon Lapponicus, Mitt. Journ. Linn. Soc. VIII. 18.

Rocks of Lake Superior, and upon the Rocky Mountains; common (No. 28). (Drummond.) Truro, N.S. (Fowler's Cat.) Canaan Forks, Queen's Co., N.B. (J. Moser.) On rocks, Pirate's Cove, N.S.; along the Jupiter River, Anticosti; common at the Falls of Fox River, Gaspé Co., Que.; crevices of rocks 10 miles south of Port Arthur, Thunder Bay, Lake Superior; abundant on rocky islands in Lake Nepigon; on rocks, at Hector and Banff, Rocky Mountains, and in Roger's Pass, Selkirk Mountains, B.C. (Macoun.) Cascade Mountains. (Lyall.) Disco and Holsteinburg, Greenland. (Fl. Gr.) On rocks at Tadousac, Que. (St. Cyr.)

(305.) A. Mougeotii, Schimp.; Lesq. & James, Mosses of N. America, 159; Canadian Musci, No. 420.

On rocks near the tunnel 5 miles below Hector, Rocky Mountains; on wet rocks, Pass Creek Falls at Sproat; on rocks on the Columbia River above Revelstoke and in Eagle Pass west of Revelstoke; at Sicamous and Agassiz, B.C.: Mount Benson, near Nanaimo, Vancouver Island; also Mount Erskine, Salt Spring Island, Gulf of Georgia. (Macoun.)

(306.) A. Californicum, Lesq. & James, Mosses of N. America, 159.

A. Sullivantii, Canadian Musci No. 111.

Near the British Columbian Boundary. (Lyall.) On rocks at Yale, B.C., and on rocks near Mount Tolmie, Victoria and at the Nanaimo River, Vancouver Island. (Macoun.)

(307.) A. caespitosum, Lesq. & James, Mosses of N. America, 160.

Didymodon csespitosus, Mitt. Journ. Linn. Soc. VIII, 18.

Vancouver Island. (Lyall.) On rocks near Oak Bay, Victoria, Vancouver Island, and on Mount Erskine, Salt Spring Island, Gulf of Georgia, B.C. (Macoun.)

304. A. Lapponicum, Schimp.

Zygodon lapponicus. Hedw.; Kindb., Bryol. N. Am. & Eur 316.

On wet rocks in a ravine at Margaree, Cape Breton Island, N.S., July, 1898; crevices of rocks, Cāche Lake, Algonquin Park, June, 1900; in the Crow's Nest Pass, and at Lake Louise, Rocky Mountains, Alta., 1897; on damp rocks, Whirlpool Rapids, Niagara Falls, 1901. (Macoun.) On rocks, Chilliwack Valley, B.C., 1901. (J. M. Macoun.) Lake Lindeman and Lake Marsh, Yukon. (Williams.)

Subsp. decipiens, Kindb., Bryol. N. Am. & Eur. 317.

Perichetial leaves longer acuminate than in A. lapponicus; costa long excurrent.

On rocks at Agassiz, B.C., May 15th, 1889; Mount Benson, near Nanaimo, Vancouver Island, June 8th, 1887; and at Gold-stream, Vancouver Island, June 2nd, 1893. (Macoun.)

305. A. Mougeotii, Schimp.

Zygodon Mougeotii, Bryol. Eur.; Kindb., Bryol. N. Am. & Eur. 316.

Oa damp rocks in a ravine at Margaree, Cape Breton Island, N.S., July, 1898; on rocks in the Crow's Nest Pass, Rocky Mountains, Alta., Aug., 1897. (Macoun.)

1020. A. crispatus, Kindb., Revue Bryol. 1896.

Leaves crisped, entire, with a longer acicular point than A. Mougeotii: the perichetial leaves are broader, long-sheathing and abruptly narrowed to the subulate shorter point.

The following specimens referred in Part VI. to A. Mougeotii and Californicus belong here.

On damp rocks, Pass Creek, Sproat, Columbia River, B.C., June 20th, 1890; on rocks, Eagle Pass, Gold Range, near Revel-stoke, B.C., May 9th, 1890; on rocks at Yale, B.C., May 17th, 1889; on rocks at Sicamous, B.C., July 7th, 1889. (Macoun.)

306. A. Californicum, Lesq. & James.

Zygodon californicus, Hampe; Kindb., Bryol. N. Am. & Eur., 316.

l02l. A. Sullivantii, Lesq. & James, Mosses of N. America.

Zygodon Sullivantii, C. Muell.; Kindb., Bryol. N. Am. & Eur., 315.

On wet rocks Halfway Brook, Cape Breton Island, N.S., Aug. 4th, 1898. (Macoun)