XXI. Leucodonteae. 97. Leucodon, Schwaegr

(621.) L. sciuroides, Schwaegr; Lesq. & James, Mosses of N. America, 288; Canadian Musci, No. 237.

On the bark of trees, Bass River, N.B. (Fowler's Cat.) On trees, Queen's Co., N.B. (J. Moser.) On trees, Rustico Bay, Prince Edward Island; on trees along the Graspé coast, Que.; common on trees at Ottawa, Belleville, Leamington, Owen Sound and throughout Ontario; fruiting very seldom. (Macoun.) On trees at Owen Sound, Ontario. (Mrs. Boy.) On bark of maples near London, Ont. (J. Dearness.)

(622.) L. brachypus, Brid.; Lesq. & James, Mosses of N. America, 288.

On trees along the Gaspé coast, Que.; high up on maple trunks at Owen Sound, Ont. (Macoun.) On trees near Pictou, N.S. (McKay.)

99. Pterogonium, Swartz

(625.) P. brachypterum, Mitten; Lesq. & James, Mosses of N. America, 290.

British North America. (Drummond.) On old logs at the mouth of Sturgeon Creek, near Leamington, Ont. (Macoun.)

XXII. Hookerieae. Ioi. Pterycophyllum, Brid

(629.) P. lucens, Brid.; Lesq. & James, Mosses of N. America,

293 ; Canadian Musci, No. 247.

In water pools and borders of marshes in the springtime, along the Columbia River, above Revelstoke, also by pools in woods at Hastings, B.C.; wet places in woods around Comox, Vancouver Island. (Macoun.)

XXIII. Fabronieae. 102. Fabronia, Raddi

(630.) F. pusilla, Raddi.; Lesq. & James, Mosses of N. America,

294 ; Canadian Musci, No. 508.

Crevices of steep rocks over which water trickles in spring at Deer Park, Lower Arrow Lake, Columbia River, B.C., June 8th, 1890. (Macoun.)

Subgenus IV. Rhytidium, Sulliv

(866.) H. rugosum, Linn.; Lesq. & James, Mosses of N. America, 388; Canadian Musci, No. 341.

H. rugulosum, Drumm. Musc. Bor. - Am., No. 198. Rhytidium rugosum Kindb. Laubm. Schwd. u. Norveg.

Lake Superior; in fructification at Beaver Lake; rare. (Drum-mond.) On dry rocks, Kakabeka Falls. 30 miles west of Fort William,

Lake Superior. (Mrs. E. G. Britton.) On dry rocks, near Current River, north of Port Arthur, Lake Superior; also on rocks along Nepigon River, Ont.; on rocks, "Dry Canon," discharge of Devil's Lake, and on rocks at Morley, foothills of Rocky Mountains; also on the banks of Peace River at the mouth of Smoky River, lat. 56° 30'. (Macoun.) Little Bay Islands, Labrador. (Rev. A. Waghorne.) Greenland. (Fl. Gr.)