30. Thelotrema, (Ach.) Eschw

274. T. lepadinum, (Ach.)

On bark of trees and dead wood.

On bark of trees, Labrador or Newfoundland. (Waghorne fide Eckfeldt.) Arctic America. (Richardson.) On ash trees at Ottawa, Ont.; on Douglas fir, Victoria, Vancouver Island and on Alnus rubra at Comox, and Alberni, Vancouver Island. (Macoun)

275. T. subtile, (Tuckerm.) Eckfeldt.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.)

34. Thamnolia, (Ach.) Mass

324. T. vermicularis, (Sw.) Schaer.

On earth in northern and alpine districts.

Greenland. (Arct. Man) Battle Harbour, Labrador and Newfoundland. (Waghorne) Arctic America. (Richardson.)

Mansfield Island, Hudson Strait. (Dr. R. Bell.) Amongst moss, Mount Albert, Gaspé Co., Que.; Bow River Pass and Sulphur Mountain, Banff; at Hector and MooseMountain, Rocky Mountains; on rocks near Victoria, on Mount Benson near Nanaimo, and on Mount Arrowsmith, Vancouver Island. (Macoun.) Port E ches, Alaska, and Unalaska, Behring Sea. (J. M. Macoun.)

39. Scoliciosporum

473. S. psotinum, (Fr.) Th. Fr.

On stones, Little Harbour, and on bark, St. John's Beach, Newfoundland. (Waghorne.)

41. Lecanactis, (Eschw.) Koerb

515. L. abietina, (Ach.) Koerb.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On trunks of spruce, Arctic America, between Lat. 54o and 64o N. (Richardson.)

516. L. premnea, Ach. var. chloroconia, Tuckerm.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On white spruce bark, Swan Lake House, Lake Winnipegosis, Man., July 6th, 1881. (Macoun.)

43. Xylographa, Fries

522. X. parallela, (Ach.) Fr.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On old fence rails at Margaree, Cape Breton Island, N.S., July, 1898; on old fences, Main Station, Sable Island, N.S., July, 1899; on dead wood in northern British Columbia. (Macoun) Islands in Cross Sound, Alaska, (Rothrock.)

523. X. Opegraphella, Nyl.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On dead wood on the island of Grand Manan, New Brunswick. (Willey.) On old logs on the sea beach, Gaspé coast, Gaspé Co., Que.; on old rails at Margaree, Cape Breton Island, N.S., July, 1898. (Macoun.) Cook's Inlet, Alaska. (Rothrock.)