(166.) L. tortile, Muell.; Lesq. & James, Mosses of N. America, 105; Canadian Musci, No. 65.

Didymodon tortile, Drumm. Musc. Bor. - Am., No. 118.

Portage between Fort William and Rainy Lake, west of Lake Superior. (Drummond.) Growing on clay, Nipisiquit Falls, Kent Co., N.B. (Fowler's Cat.) Nottingham Island, Hudson Strait. (B. Bell.) On earth at Truro, N.S. (Macoun.) On earth at Canaan Forks, Queen's Co., and Tay, York Co., N.B. (J, Moser.) New Harbor, Newfoundland. (Rev. A. Waghorne.) Pictou, N.S. (McKay.)

(167.) L. vaginalis, Lesq. & James, Mosses of N. America, 106; Canadian Musci, No. 386.

On earth by roadsides, Brackley Point, Prince Edward Island. (Macoun.) On roadsides, Kent Co., N.B. (Fowler's Cat.)

(168.) L. homomallum, Hampe; Lesq. & James, Mosses of N. America, 107.

Didymodon heteromallum, Drumm. Musc. Bor. - Am., No. 119.

On earth by the torrent that enters Kicking Horse Lake by the station at Hector, Rocky Mountains, 1890. (Macoun.) West side of Rocky Mountains; sparingly. (Drunvmond.)

(169.) L. flexicaule, Hampe; Lesq. & James, Mosses of N. America, 107; Canadian Musci, No. 66.

Didymodon flexicaule, Drumm. Musc. Bor. - Am., Nos. 125-126.

Alpine woods and banks; about Lac de Bois, Rocky Mountains. (Drummond.) Twelve-mile Pool, Jupiter River, and Salt Lake, Anti-costi; in a ravine at Whycocogmah, Cape Breton; on rocks at the mouth of Peace River Canon, lat. 56°; abundant on wet rocks by the torrent at Hector and at Banff, Rocky Mountains; on rocks, Lake Mara, atSicamous, B.C.; abundant on rocks along the Columbia River, above Revelstoke, also at Deer Park on Lower Arrow Lake, B.C. (Macoun.) Jakobshavn, Greenland. (Fl. Gr.)

*L. brevifolium, Kindb., n. subsp.

Leaves very small, from the ovate-oblong base contracted to a shorter point; costa not excurrent. This form is perhaps a distinct and proper species; the tufts are quite barren.

On rocks in the "Dry Canon" near the discharge of Devil's Lake, National Park, Rocky Mountains, Aug. 10th, 1891. (Macoun.)

Var. densum, Schimp.; Canadian Musci, No. 461.

On rocks at Morley, Banff and Hector, Rocky Mountains; on damp earth along the Columbia River at Donald and Revelstoke, B.C. (Macoun.)

(170.) L. pallidum, Hampe; Lesq. & James, Mosses of N. America, 107; Canadian Musci, No. 67.

On the ground in woods west of Belleville; in woods near Bismarck, and at Leamington, Ont. (Macoun.)

(171.) L. glaucescens, Hampe; Lesq. & James, Mosses of N. America, 108; Canadian Musci, No. 68.

Didymodon glaucescens, Drumm. Musc. Bor. - Am., No. 117.

Upon the shores of Lake Superior, and near York Factory, Hudson

Bay. (Drummond.) Bank of St. Anne des Monts River, Gaspé Co., and crevices of rocks along the Gatineau, at Kirk's Ferry and at Leamy's Lake, near Hull, Que.; on the shores of Oak Hills Pond, Hastings Co., and by the shores of many others in the same county; shore of Lake Nipissing, Ont.; on the bank of a brook at Sicamous, B.C. (Macoun.) Near the summit of Mount Queest, Gold Range, B.C. (J. M. Macoun.) Godhavn, Greenland. (Fl. Gr.)