52. N. compressa, (Hook.) S. F. Gray.

Greenland. (Vahl.) On Atka Island, Aleutian Islands, Alaska, 29th Aug., 1891. (J. M. Macoun.)

53. N. scalaris, (Schrad.) S. F. Gray.

Campo Bello Island, N.B., 1898. (Prof. Farlow.) On earth near Nanaimo, Vancouver Island, June 4th, 1887. (Macoun.) Yes Bay and Juneau, Alaska. (Evans.) Dawson, Yukon. (Williams.') Scoresby Sound, East Greenland. (C. Jansen.)

54. N. hsematosticta, (Nees) Lindb.

Disenchantment Bay, Hidden Glacier Inlet, St. Lawrence Island, Unalaska and Cape Nome, Alaska. (Evans.) Scoresby Sound, East Greenland. (C. Jansen.)

55. N. obovata, (Nees) Lindb.

On stones at Glacier, Selkirk Mountains, B.C., Aug. 6, 1890. (Macoun.) Farragut Bay and Kadiak Island, Alaska. (Evans.) Scoresby Sound, East Greenland. (C. Jansen.)

56. N. crenulata, (Smith) Lindb.

Greenland. (J. Vahl.) On earth by a roadside, near Brackley Point, Prince Edward Island; on earth at Truro, N.S., June I2th, 1883; on earth along roads at Baddeck and Aspy Bay, Cape Breton Island, N.S., July, 1898; on earth at Ottawa, Ont, 1883; on wet rocks at Yale, Fraser River, B.C.; on old logs, Stanley Park, Vancouver, B.C.; on sandstone rocks at Hastings, Burrard Inlet, B.C.; on earth at Victoria, Vancouver Island, May 7th, 1875; on earth along Shawnigan Lake, Vancouver Island, and in a wet cutting of the railway close to that lake. (Macoun.)