IX. Orthotricheae. 48. Coscinodon, Sprengel

(299.) C. pulvinatus, Spreng.; Lesq. & James, Mosses of N. America, 154.

On rocks, Alaska. (Harrington.) On rocks along the Telegraph Trail, north of Blackwater River, B.C. (Macoun.) Mountain rocks in alpine situations. (Drummond.)

49. Ptychomitrium, Bruch & Schimp

(300,) P. Gardneri, Lesq.; Lesq. & James, Mosses of N. America, 156.

On rocks along the most western brook at Deer Park, Lower Arrow Lake, B.C. (Macoun.)

(301.) P. incurvum, Sulliv.; Lesq. & James, Mosses of N. America, 157.

Grimmia Hookeri, Drumm. Musc. Bor. - Am., No. 61.

On a stone near the Falls of Niagara, in Ontario; rare. (Drum-mond.)

50. Clyphomitrium, Brid

(302.) G. Canadense, Mitt.; Lesq. & James, Mosses of N. America, 158; Mitt. Journ. Linn. Soc. VIII., 21.

British North America. (Drummond.)

51. Zycodon, Hook. & Tayl

(303.) Z. viridissimus, (Dicks.) E. Brown.

Gymnostomum viridissimum, Druram. Musc. Bor.Am., No. 27.

White Falls, between Norway House and Hudson Bay at York Factory. (Drummond.)

53. Drummondia, Hook

(308.) D. clavellata, Hook.; Lesq. & James, Mosses of N. America, 160; Canadian Musci, No. 525; Drumm.Musc. Bor. - Am.

No. 62.

On trees, Upper Canada (Ontario.) (Drummond.) On trees in the thick woods at Owen Sound, and in woods at Port Dover, Ont. (Macoun.)

Var. Canadensis, Kindb. (n. var.)

Differs in the leaves being larger and longer, also in the monoecious inflorescence.

On trees, Pelee Island, Lake Erie, June 16th, 1882. (Macoun.)

57. Merceya, Schimp

(375.) M. (Scopelophila) latifolia, Kindb., Bull. Torr.Bot. Club, XVI., 94; Canadian Musci, No. 459.

Densely caespitose. Plants 1-2 cm. high, brown-ferruginous~below, green at the tips, divided, at the base radiculose. Leaves quite smooth, spathulate-lingulate, obtusate or sub-acute, entire, slightly reflexed at base, plane above, broad-bordered with greater, orange-colored cells; basal cells narrow, upper small and round; costa percurrent or scarcely excurrent. Habit of Barbula ruralis.

On the upper slopes of Mount Finlayson near Goldstream, Vancouver Island, May 18th, 1887. (Macoun.) This fine species was found in California (Herb. G. Mueller) but not described. (Kindberg.)