294 CARDOT AND THERIOT [334J 



seriebus secundum margines superne productis, casteris linearibus, 

 4045 fj. longis, 67 latis, parietibus incrassatis. Caetera ignota. 



From St. Paul Island (Trelease, 1861, 2087); Agattu Island (U. 

 S. S. Albatross Exped., 40). 



Distinct from S. acuminatum Ren. & Card, by its habit, its 

 more abruptly acuminate leaves, etc. It more closely resembles B. 

 albicans Br. eur., from which it differs by its shorter and more 

 abruptly acuminate leaves, its quadrate more numerous alar cells, its 

 more chlorophyllose areolation, and by its narrower, short and often 

 bifurcate costa. 



Brachythecium albicans Br. eur., fasc. 52-54, p. 19, pi. 19. 



From Yakutat Bay (Trelease, 2342) ; Muir Glacier (Trelease, 

 1909) ; Wrangell (Canby, 468, 472) ; Sturgeon River Bay, Kodiak 

 (Trelease, 1930); St. Paul Island (Trelease, 1863); Agattu Island 

 (U. S. S. Albatross Exped., 16 in part). Several forms. 



Brachythecium salebrosum Br. eur., fasc. 52-54, p. 16, pi. 15, 16. 

 From Cape Fox (Trelease, 1762 in part, 1963) ; Skagway (Canby, 

 481 in part, forma angustifolia~} ; Yukon River (W. H. Dall, in 1867) ; 

 Sitka (Trelease, 2002) ; Agattu Island (U. S. S. Albatross Exped., 

 1 6 in part). 



Brachythecium novae-angliae Jaeg. & Sauerb. Adumbr., n, p. 394. 



From Kodiak (Trelease, 2057) ; St. Paul Island (Trelease, 2091). 

 New to Alaska. 



On these specimens nearly all the leaves are smooth on the back ; 

 however we have found a few branches with papillose leaves, 

 which, added to the other characters, leaves no doubt as to their de- 

 termination. Moreover, even on the specimens from New England, 

 the leaves are sometimes quite smooth. This character is therefore 

 variable, which prevents us from admitting the genus Bryhnia. 



Mr. A. J. Grout has recently ascertained that Hypmim chloropte- 

 rum C. Mull. & Kindb., from Canada, and H. scabridum Lindb., from 

 Norway, should be reunited to B. novce-anglice (cf. Bull. Torr. Club, 

 xxv, pp. 229231). The distribution of this species, as it is now 

 known, includes southern Norway, eastern Canada, Newfoundland, 

 Miquelon Island, the Eastern States as far south as Maryland and as 

 far west as Wisconsin, Alaska, the Bering Sea Islands and Japan. 



Brachythecium rivulare Br. eur., fasc. 52-54, p. 13, pi. 12. 



From Juneau (Trelease, 1796) ; Disenchantment Bay (Trelease, 

 1829); Orca (Trelease, 1840). 



