254 Rhodora [DECEMBER 
Thursdays in January at 4 P. M., in the lecture-room of the Boston 
Society of Natural History. "The dates and subjects are as follows:— 
January 4. The Indigenous Flora of Eastern Massachusetts. 
January 11. Some Effects of Civilization upon our Flora. 
January 18. Some Local Problems in Geographic Botany. 
January 25. The Probable Geographic Origin of our Flora. 
Tickets may be secured, free of charge, at the Boston Society of 
Natural History; at the office of the Lowell Institute, 491 Boylston 
St.; or by sending a request, accompanied by an addressed, stamped 
envelope, to the Curator of the Lowell Institute, 491 Boylston St., 
Boston. 
ERRATA. 
Page 76, line 6; for oxycanthoides read oxyacanthoides. 
“ — 89, “ 16; for Thlapsi read Thlaspi. 
“ — 89, " 17; for Loesellii read Loeselii. 
“ — 80, " 27; for Siderites read Sideritis. 
+ 5108, “= 283: for K. read H. 
'"* 109, “ 12; for Altantic read Atlantic. 
“ 110, “ 7; for our read one. 
118, “ 19; for Mr. read Mt. 
" 123, “ 22; for vegatation read vegetation. 
“ 124, “ 7; for voilet read violet. 
“ 130, “ 3; for carcina read caricina. 
“132, “ 25; Insert comma after for. 
“ 138, “ 27; for meliciodes read melicoides. 
“ 138, “ 38; after p. insert 131. 
“143, “ 25; for are read is. 
" 145, “ 34; for note 1 see note 1 on page 146. 
“145, “ 37; insert ! before Warming. 
'" 146, “ 30; for Anticosti,’ read Anticosti,? 
" 146, “ 33; for Lawrence,! read Lawrence.’ 
“ 151, “ 30; for note 1 see note 1 on page 152. 
" 165, “ page heading; for arundalana read arundelana. 
* 186, “ 5; for Acrochaete read Acrochaetium. 
" 223, " 18; for tradactylites read tridactylites. 
Vol. 18, no. 155, including pages 225 to 240 and one unnumbered portrait 
was issued 25 November, 1911. 
