(326.) O. anomalum, Hedw.; Lesq. & James, Mosses of N America, 164; Canadian Musci No. 118, in part; Mitt. Journ. Linn. Soc. VIII, 24.

On rocks at Fredericton, N.B. (Fowler's Cat.') On rocks, McKay's Woods, Ottawa; on rocks, Gibson's Mountain, Prince Edward Co., Ont.; on rocks at Belleville and Shannonville, Hastings Co., Sudbury Junction and Lake Nepigon, Ont.; at Kananaskis River crossing of C. P. Ry., Rocky Mountains. (Macoun.) On rocks, Buffalo Lake and Clearwater River, lat. 56° N.W.T. (J. M. Macoun.) Saskatchewan, (Bourgeau.) Abundant on rocks at Kingston and Wolfe Island, Ont. (Fowler.) Greenland. (Fl Gr.)

Var. Americanum, Vent. (n. var.)

0. anomalum, Drumm. Musc. Bor. - Am., No. 148; Canadian Musci, No. 118, in part.

This is a form that has a yellow capsule and differs considerably from the normal form, in the well-evolute cilia.

Upon rocks; common. (Brummond.) On rocks along the shore of Lake Winnipegoosis, Man.; on boulders and sandstone rocks, Hand Hills, Alberta. (Macoun.)

----- - Var.

0. Venturi, Canadian Musci, No. 455.

On cedar (Thuya ocddentalis) rails, Simon Terrill's farm. Brighton, Northumberland Co., Ont., October 4th, 1888. (Macoun.)

(327.) O. Biyttii, Sehimp.; Greenland Flora, 351. Greenland. (Fl. Gr.)

(328.) O. nudum, Dicks, var. Rudolphianum, Schimp.

0. cupulatum, Drumm. Musc. Bor. - Am., No. 152.

Rocks near the Whirlpool, below Niagara Falls. (Drummond.) On rocks, Deer Park, Lower Arrow Lake, Columbia River; also along Kootanie Lake, B.C. (Macoun.)

(329.) O. laevigatum, Zett.; Lesq. & James, Mosses of N. America, 165; Canadian Musci, No. 454.

On rocks at Kicking Horse Lake, and on great boulders, three miles below, Rocky Mountains; common in tufts on boulders at Lytton, B. C.; also on rocks at Revelstoke, B. C.; Deer Park, Lower Arrow Lake, B. C. (Macoun.)

(330.) O. cupulatum, Hoffm.; Lesq. & James, Mosses of N. America, 165; Canadian Musci, No. 583.

On rocks, Mount Erskine, Vesuvius Bay, Salt Spring Island, Gulf of Georgia, B. C.; on rocks on mountain slopes at Spence's Bridge, B. C. (Macoun.) Baffin's Bay. (Ross, Voy.)

Var. minus, Sulliv.; Lesq. & James, Mosses of N. America, 165.

On trees, near the water, Presqu'ile Point, Lake Ontario, Aug. 16th, 1868. (Macoun)

(331.) O. Sturmii, Hoppe & Hornsch.; Lesq. & James, Mosses of N. America, 166.

On rocks at Hector, Rocky Mountains; on rocks at Deer Park, Lower Arrow Lake, Columbia River, B.C. (Macoun.)

(332.) O. Texanum, Sulliv.; Lesq. & James, Mosses of N.America, 166; Canadian Musci, No. 119.

The stomata are superficial; the lower leaf-cells dark orange.

On rocks in the Coast Range a few miles above Yale; on rocks,

Lake Mara, Sicamous, B.C.; and on rocks near Victoria, Vancouver Island. (Macoun.)

Var. globosum, Lesq.; Lesq. & James, Mosses of N. America, 166.

0. Texanum, Canadian Musci, No. 119, in part.

On rocks at Agassiz and Yale, B.C. (Macoun.)

(333.) O. Croenlandicum, Berggr.; Greenland Flora, 351. Holstensborg, Greenland. (Fl. Gr.)

(334.) O. Breutelii, Hampe; Greenland Flora, 350.

Apparently common in Greenland. (Fl. Gr.) Frederickshaab. (Rosenvinge.)

(335.) O. Barthii, Sendtn.; Greenland Flora, 351. Island of Amitsuavsuk, Greenland. (Fl. Gr.)

(336.) O, rupestre, Schleich.; Lesq. & James, Mosses of N. America, 167.

0. rupincola, Drumm. Musc. Bor. - Am., No. 156. 0. Watsoni, Canadian Musci, No. 121.

On very large boulders about three miles below Hector and at Banff in the Rocky Mountains; on rocks at Sicamous, Revelstoke and Yale, B.C. (Macoun.) Upon rocks amongst the Rocky Mountains. (Drummond.)

(337.) O. afflne, Schrad.; Lesq. & James, Mosses of N. America, 168; Drumm. Musc. Bor. - Am., Nos. 150 and 151.

On trees, Cove Head, Prince Edward Island, July 5th, 1888. (Macoun.) Upper Canada (Ontario), and about Lake Superior, on trees. (Drummond.) Trunks of trees, Lake Superior. (Agassiz.) Smith's Sound, between Lat. 78°-82°. (Dr. Hayes.)

(338.) O. alpestre, Hornsch.; Lesq. & James, Mosses of N. America, 168.

0. qffine, Drumm. Musc. Bor. - Am., No. 149.

Upon trees; from Upper Canada (Ontario) to the Rocky Mountains. (Drummond.)

(339.) O - speciosum, Nees; Lesq. & James, Mosses of N. America, 169; Canadian Musci, No. 120; Drumm. Musc, Bor. - Am., Nos. 158 and 155.

0. elegans, Schw.; Mitt.,Journ. Linn. Soc, VIII., 24; Drumm. Musc.

Bor. - Am., No. 155.

0. leiocarpum, Canadian Musci, No. 126, in part.

Upon trees, Upper Canada (Ontario). (Drummond.) On trees, Bass River and at Fredericton, N.B. (Fowler's Cat.) On trees, Dalhousie and Pictou, N.S. (McKay.) Tadousac, Que. (St. Cyr.) On logs and trees, Gaspé Co., Que.; on trees at Ottawa and Owen Sound, Ont.; on trees, Lake Winnipegoosis, Man.; on trees at Comox and Victoria, Vancouver Island; also at Sicamous, B.C. (Macoun.) On trees, Canaan Forks, Queen's Co., N.B.; on trees, Canaan Forks, Queen's Co., N.B. (J. Moser.) On trees at Bass River and Frederic-ton, N.B. (Fowler's Cat.) Abundant on trees in various parts of Prince Edward Island; on trees, coast of Gaspé Co., Que.; Belleville and Owen Sound, Ont.; on trees near Green Lake, Saskatchewan; at Morley near the Rocky Mountains; at Lesser Slave Lake, N.W.T. (Macoun.)

(340.) O. Braunii, Bruch & Schimp.; Bryol. Europ.

On trees, near Brackley Point, Prince Edward Island, August 2nd, 1888. (Macoun.)

(341.) O. Killiasii, C. Muell.; Greenland Flora, 350. Disco Island. Greenland. (Fl. Gr.)

(342.) O. sordidum, Sulliv. & Lesq.; Lesq. & James, Mosses of N. America, 170; Canadian Musci, No. 122. (?)

On trees, Bass River, Kent Co., KB. (Fowler's Cat.) On trees at Campbellton, N.B.; common at Ottawa and Sudbury Junction, Ont.; quite common on maple trees at Goulais Bay, Lake Superior. (Macoun.) On trees at Tay Forks, York Co., and Canaan Forks, Queen's Co., N.B. (J. Moser.) All these references are doubtful, as the specimens remain undecided.