102 



embarrassing. Apparently the senders of such Hterature are 

 unmindful of the fact that in these days of specialization it is 

 impossible for any one person to be seriously interested in all the 

 botanical sciences and arts, and think that every one who belongs 

 to a botanical society or is called a botanist should be interested 

 in all botanical literature; or else they find it easier to waste 

 a certain percentage of their separates than to prepare a new 

 mailing list of presumably interested persons for each paper they 

 publish. Perhaps the time is not far distant when on account 

 of its indefiniteness the term "botanist" will be as little used as 

 "naturalist" and "biologist" are now, and persons who work 

 with plants will be more specifically designated as taxonomists, 

 physiologists, geneticists, ecologists, phytogeographers, etc." 



ERRATA 



We regret to be obliged to print the following corrections to 



the article on "The Genus Cetraria," etc., Torreya 15: 213-230. 



1915. The author's copy was correct. 



Page 216: t after ''vulgaris,'' line 28, should follow with its 

 footnote, "1910," line 6, page 217, i. e., the footnote on 

 page 216 under the f is the type locality, and original 

 description of C. hiascens var. macrophylla. 



Page 218: Omit under fig. 2, "(reduce to 2 in. wide)." These 

 were pencil instructions given to cut maker, and should 

 not have been printed. 



Page 219: t following "vulgaris,'' line 30, should be substituted 

 by two asterisks — a method used to denote forms below 

 species. The "f littoral examples," last line on page 

 219 should have been on the bottom of page 221, and 

 a t should have followed the word "olivaceous," line 5 

 of same page. 



Page 222: The * and f, lines 5 and 7, should have appeared on 

 page 222, the * after "1850)" fine 14, the f after 

 "1850)" line 19, i. e., the first footnote, *, page 222, 

 is original desription for C. islandica 7 tuhulosa, page 

 221; the second footnote, f, page 222, the type locality 

 and original description for C. islandica f erinacea, 

 page 221. 



