(898.) H. pa lustre, Huds.; Lesq. & James, Mosses of N. America, 398; Canadian Musci, No. 356; Drumm. Musc. Bor. - Am., No. 195.

Upon rocks in rivers; common. (Drummond.) On rocks in brooks,. Never's Rapids, Queen's Co., N.B. (J. Moser.) On stones in Jupiter River, Anticosti; on stones in Fox River and in Ste. Anne des Monts River, Gaspé Co., Que.; on rocks below Jones Falls, near Owen Sound, Ont.; on stones Black River, Lake Nepigon; also on rocks in Current River, near Port Arthur, Lake Superior; on stones in Swift Current Creek, Assiniboia; in a ravine on Sulphur Mountain, at Banff, Rocky Mountains; on stones in a brook, Roger's Pass, Selkirk Mountains; in a brook at Deer Park, Columbia River; in a creek at Spence's Bridge, B.C. (Macoun.) On wet rocks summit of Mount Queest, Gold Range and up the North Thompson River, B.C. (J. M, Macoun.)

(899.) H. Columbico-palustre, C. M. &Kindb. (n. sp.); Canadian Musci, No. 493.

Differs from Hypnum palustre in the leaves being longer-apiculate, faintly denticulate, the margins recurved below at one side, the alar cells dilated, well-defined, the costa stout, vanishing above the middle.

On rocks at the mouth of the Illicillewaet Canon, near Revelstoke, B.C., May 18th, 1890. (Macoun.)

(900.) H. dilatatum, Wils.; Canadian Musci, No. 357.

IT. (Limnobium) molle, Lesq. &, James, Mosses of N. America, 399; Drumm. Musc. Bor. - Am., No. 194.

On stones in Gull River, Victoria Co., Ont.; on stones in brooks-along the north shore of Lake Superior; abundant on stones in the-Kamanistiquia River, below Kakabeka Falls, west of Lake Superior; on rocks in the stream that discharges the Asulcan Glacier, Selkirk

Mountains, B.C. (Macoun.) In rivulets, immediately to the westward of the "Height of Land," Rocky Mountains. (Drummond.) Greenland. (Fl. Gr.)

(901.) H. pseudo-arcticum, Kindb., Bull.Ton-. Bot. Club, XVII, 280.

Differs from H. arcticum in the leaves being crenulate at least above the middle; costa short and double, not reaching to the middle; peri-chetial leaves short-acuminate, serrulate. Peristomial segments rimose in the middle. Stem sparingly radiculose.

On stones in mountain brooks near Sicamous; and in brooks on the Gold Range, north of Griffin Lake, B.C. July 9th, 1889. (Macoun.)

(902.) H. Norvegicum, Bruch & Schimp., Bryol. Europ. VI. Greenland. (Fl. Gr.)

(903.) H. polare, Lindb. Greenland. (Fl Gr.)

(904.) H. circulifolium, C. M. & Kindb. (n. sp.)

Nearly allied to Hypnum dilatatum, Wils. (H. molle, Lesq. & James). Stem loosely foliate, denudate at the base. Leaves patent, when dry subcircular, faintly crenulate nearly all around, slightly decurrent, at the cordate base distinctly auriculate and in the middle carinate, narrowed above to an indistinct obtuse tip; alar cells large, innate, sub-oval, the apical also short, the other narrow and flexuous; costa none or indistinct. Barren.

On rocks, Never's Rapids, Queen's Co., KB., July, 1889. (J. Moser.)

(905.) H. arcticum, Sommerf.; Lesq. & James, Mosses of N". America, 400; Canadian Musci, No. 358.

On stones in Fox River and St. Anne des Monts River, Gaspé Co., Que.; on rocks along Lake Nepigon, Ont.; on stones in brooks, Roger's Pass, Selkirk Mountains, B.C.; also along the Quesnel River, Quesnel, B.C. (Macoun.) Rocky Mountains. (Lyall.) Greenland. (Fl. Gr.)

(906.) H. Goulardi, Schimp.

On stones in Ste. Anne des Monts River, Gaspé Co., Que.; and along Gunn River, Anticosti. (Macoun.)

(907.) H. torrentis, C. M. & Kindb. (n. sp.) H. Goulardi, Canadian Musci, No. 503.

Differs from H. Goulardi in the stems being filiform, very rigid, the leaves smaller, subcircular, crenulate all around, reflexed at the basal margins, the costa thick and nearly percurrent; it differs also from Hypnum arcticum in the loosely disposed, decurrent leaves and their large angular cells. -

On sloping limestone rocks in the bed of the torrent a little above the station at Hector, Rocky Mountains, August 12th, 1890. (Macoun.)

(908.) H. alpestre, Swartz.; Lesq. & James, Mosses of N. America, 399; Canadian Musci, No. 396.

On rocks in a glacier stream discharging the melted snow on the east side of Castle Mountain, and on Vermillion Mountain at Banff, Rocky Mountains. (Macoun.) Greenland. (Fl. Gr.)

(909.) H. montanum, Wils. MS.; Lesq. & James, Mosses of N. America, 401.

On damp rocks in the bed of Sydenham River at Owen Sound, Ont. (Macoun.) Pickle Harbor, Newfoundland. (Rev. A. Waghorne.)

(910.) H. pseudo-montanum, Kindb. (n. sp.) ; Canadian Musci, No. 539.

Nearly allied to Hypnum montanum, differing principally in the stem being longer and more robust, the leaves larger and thinner, more loosely disposed, longer decurrent, not distinctly denticulate, the alar cells large, reaching to the costa, which is simple and prolonged above the middle. Inflorescence monoecious. Capsules not found.

This species and Hypnum montanum have a peculiar habit in the leaves being variously curved, either incurved or recurved in the same specimen, and are rather appearing to belong to the section Campylium. Their position in the section Limnobium is at least doubtful.

On rocks in all the streams around Owen Sound, especially below Jones Falls and the Potawatomie Falls, September 15th, 1890. (Macoun.)

(911.) H. eugyrium, Schimp.; Lesq. & James, Mosses of N. America, 401; Canadian Musci, No. 535.

On stones, Bass River, N.B. (Fowler's Cat.) On stones in the brook at Pirate's Cove, Straits of Canso, N.S.; on stones in a ravine, Sulphur Mountain, Banff, Rocky Mountains. (Macoun.) Pictou Co.,

N.S. (McKay.) Miqueion Island. (Delàmare.) Chance Cove, Green Island, White Bay and Topsail Harbor, Newfoundland. (Rev. A. Wag-home.)

(912.) H. ochraceum, Turner, MS.; Lesq. & James, Mosses of N. America, 401; Canadian Musci, No. 360.

Pictou Co., N.S. (McKay.) Battle Harbor, Labrador; and Broad Cove, Newfoundland. (Rev. A. Waghorne.) Kent Co., and Frederic-ton, N.B. (Fowler's Cat.) On stones in brooks, Canaan Forks, Queen's Co., N.B. (J. Moser.) On stones in brooks at Truro, N.S.; on wet rocks at Mamainse, Michipicotin and Otter Head, Lake Superior; on rocks in brooks, House .Mountain, near Lesser Slave Lake, N.W.T.; on wet rocks, Peace River, at Hudson Hope, lat. 56°; on earth and. stones, Bear Creek, Roger's Pass, Selkirk Mountains, B.C.; on stones in streams on the Gold Range, north of Griffin Lake, B.C.; also on dripping rocks, North Arm, Burrard Inlet, B.C. (Macoun.) Cascade Mountains, B.C. (Lyall.) Davis Straits. (Taylor.) Greenland. (Fl. Gr.) Sitka, Alaska, 1891. (J. M. Macoun)

(913.) H. stramineum, Dicks.

H. (Calliergori) stramineum, Dicks; Lesq. & James, Mosses of N. America,. 405; Canadian Musci, No. 473; Drumm. Musc. Bor. - Am., No. 210.

In a marsh at the "Height of Land," Rocky Mountains; but rare. (Drummond.) Miquelon Island. (Delàmare.) Hopewell Bay, Newfoundland; Indian Harbor, and Venison Tickle, Labrador. (Rev. A. Waghorne.) Cape Chudleigh, Mansfield Island and Nottingham Island, Hudson Strait. (R. Bell.) Bogs and swampy woods, Jupiter River, Anticosti. (Macoun.) Among sphagnum, at Bass River, N.B. (Fowler's Cat.) Peat bog, Mer Bleue, near Ottawa; in a small bog two miles west of the C. P. Ry. station, Roger's Pass, Selkirk Mountains; among grass at the summit of the Gold Range, north of Griffin Lake, B.C. (Macoun.) Greenland. (Fl. Gr.)

(914.) H. trifarium, Web. & Mohr.

H, (Colliergon) trifavium, Web. & Mohr; Lesq. & James, Mosses of N. America, 405; Canadian Musci, No. 365.

In stagnant pools, Wellington Beach, Prince Edward Co., Ont.; boggy shore of Lake Huron at the Fishing Islands, Bruce Co., Ont.; in a bog at Hector, Rocky Mountains; in peat bogs near the Nechacco River, Northern British Columbia. (Macoun.) Greenland. (Fl Gr.)

(915.) H. turgescens, Schimp.

H. (Calliergon) turgescens, Schimp.; Lesq. & James, Mosses of N. America, 406; Canadian Musci, No. 483.

Davis Straits. (Lyall.) In boggy places at Hector, and in a glacier stream, on the mountain north of it, alt. 7,500 feet; also on Mount Aylmer, alt. 8,300 feet, Rocky Mountains; in a small brook, Roger's Pass, Selkirk Mountains, B.C. (Macoun.) Greenland. (Fl.Gr.)

(916.) H. scorpioides, Linn.

H. (Scorpidium) scorpioides, Linn.; Lesq. & James, Mosses of N. America, 406; Canadian Musci, No. 366; Drumm. Musc. Bor. - Am., No. 200.

Common in marshes near Carlton House. (Drummond.) In very marshy peat bogs, Salt Lake, Anticosti; on the boggy margins of small lakes near Marmora Village, North Hastings, Ont.; in bogs at Castle Mountain and Hector, Rocky Mountains. (Macoun.) Greenland. (Fl. Gr.) Miquelon Island. (Delaware.) Battle Harbor, Labrador; and Western Cove, White Bay, Newfoundland. (Rev. A. Waghorne.)

(917.) H. badium, Hartm.

H. (Calliergon) badium, Hartm.; Lesq. & James, Mosses of N. America, 406.

On rocks, coast of Labrador. (J. A. Allen.) Greenland. (Fl. Gr.)