Mosses HE 



rarely extending 1-3 up the leaf; branch leaves narrower than those of the stem, 

 very concave, entire, mostly ecostate or with very short costa; cells of stem 

 leaves pale, quite uniform to near the base, with thin walls, the median 25-40 n 

 long and 7-8 ju wide, the basal cells with often somewhat thickened and golden 

 brown walls, broader and shorter than above and extending to the costa, the 

 alar rarely forming a rather distinct, somewhat inflated cluster. 



Type locality, swamp on Pihumalerksiak island, a little stony island off 

 Cockburn point, Dolphin and Union strait, Northwest Territories, July 15, 

 1916, F. Johansen. 



This species seems to come nearest C. stellatum but the leaves are relatively 

 much broader below, the cells about twice as broad in proportion to their 

 length, with the cell-walls thinner throughout and not pitted. 



Genus Rhytidium (Sull.) Kindb. 

 Rhytidium rugosum (Ehrh.) Kindb. 



On boulder, Sadlerochit river about 25 miles inland from Camden bay, 

 Alaska, Nov. 13, 1913. Cape Barrow, Coronation gulf, Northwest Territories, 

 middle of August, 1915, R. M. Anderson. 



Genus Hylocomium B.S. & G. 

 Hylocomium alaskanum (L. & J.) Kindb. 



On boulder at Konganevik, Camden bay, Alaska, June 29, 1914, and on 

 tundra at Collinson point, Alaska, October 9, 1913. 



Genus Stereodon (Brid.) Mitt. 



Stereodon Bambergeri (Sch.) Lindb. 



Tundra at Bernard harbour, Northwest Territories, June, 1916. 



Stereodon cupressiformis (L.) Brid. 



On boulder at Konganevik, Camden bay, Alaska, June 29, 1914. Tundra 

 hummock, Collinson point, Alaska, June 3, 1914. 



Stereodon revolutus Mitt. 



"Uluksok's island," Bernard harbour, Northwest Territories, June, 1916. 

 Valley back of Bernard harbour, May 9, 1916. 



Stereodon Vaucheri (Lesq.) Lindb. 



Chantry island, Dolphin and Union strait, Northwest Territories, June 17, 

 1916. 



Family BRAGHYTHECIACEAE. 



Genus Camptothecium B.S. & G. 

 Gamptothecium lutescens (Huds.), B.S. & G. Bry. Eur. 



Boulder at Konganevik, Camden bay, Alaska, June 29, 1914. Island south- 

 east of Lady Franklin point, Coronation gulf, Northwest Territories, March 

 12, 191C. 



