Secrion IV., 1912 { 129] Trans. R.S. C. 
Bibliography of Canadian Botany for the year 1911. 
By A. H. MacKay, LL.D. 
(Read by title, May 14, 1912). 
ARTHUR, J. C. 
“New Species of Uredineae—VII.”’ (Includes 13 new species; in Puc- 
cinia (3), Uromyces (2), Uropyxis (1), Uredo (3), Peridermium (1), and 
Aecidium (3)). Bull. Torrey Club, XXXVII: 569-580. f. 1. 11 Jan. 
1911, New York. 
ARTHUR, J. C. 
“Some Alaskan and Yukon Rusts.” Plant World, XVI: 233-236. 
Oct. 1911. 
Baitey, L. W. 
“The Fresh water Diatoms and Diatomaceous Earths of New Bruns- 
wick.’ (Fresh water diatoms from four localities, brackish water diatoms 
of the lower St. John River and Kennebecasis in 18 localities, a table show- 
ing distribution of about 100 sp. in 15 localities, a plate illustrating 45 
species, hydrographic data, and tripolites). Bull. Nat. Hist. Soc. N.B., 
VI: 291-230. 1911, St. John. 
BuancuHarp, W. H. 
“A Necessary Change of Name.” (Rubus amicalis nov. nom. for À. 
amabilis. Blanchard, Rhodora VIII: 173, 1906) Rhodora XIII: 55, 56. 
Mar. 1911, Boston. 
BLaANcHarD, W. H. 
“A New Variety of Rubus Canadensis.” (Var. septemfoliatus, in New- 
foundland, Kane Valley, Norris Arm and Grand Falls.) Rhodora XIII: 
193-195, Sept. 1911, Boston. : 
BLANCHARD, W. H. 
“The Range of the Black Birch to be restricted.” (Betula lenta south 
of line from Portland to Montreal as a rule.) Rhodora XIII: 206-207. 
Sept. 1911, Boston. 
BLANCHARD, W. H. 
“Rubus of Eastern North America.” Bull. Torrey Club. XXXVIII: 
425-439. Oct. 1911. 
BuLLER, A. H. R. 
“Upon the Number of Micro-Organisms in the Air of Winnipeg.” (Bac- 
teria, yeasts and fungi. Highest no. in 10 liters 263, Sept. 28, 1908; lowest 
in 50 liters 0, 25 March 1909. Air in Winnipeg three times richer in Micro- 
Organisms than six miles out.) Trans. R. 8. C., Sect. IV., 1910. pp. 41-58, 
2 plates of curves. Ottawa, 1911. 
