LiCHEivfs OP Minnesota. 251 



An ample bibliography, prepared by P. L. Ricker of the 

 United States Department of Agriculture, follows the descriptive 

 portion. Students who have vainly sought some necessary 

 reference will thank the author for indicating the libraries where 

 the works cited were consulted. But it seems a pity that the 

 list of libraries was limited to those where the works were ac- 

 tually consulted. Had it been extended to include those in the 

 western part of the United States, it would have been of much 

 greater benefit to students in the western United vStates. 



Professor Fink is to be congratulated upon the excellent 

 typography and well printed illustrations of his paper, as so 

 many works on lichens have been spoiled by inferior mechanical 

 workmanship. The volume seems to be quite free also from 

 typographical errors, those noted by me being relatively unim- 

 portant and not at all confusing to any one; for example the 

 reference on page 14 to fig. 17 should be page 240 and not page 

 239, but this and similar errors would not cause any trouble. 

 On page 149 are the words "Nylander's Heppia arenivaga from 

 Japan"; this is an error, the locality being given by Nvlander as 

 Colorado. On page 156 the statement is made that Sticta fuligi- 

 nosa "is so near to the last (Sticta limhata) that the two are very 

 difficult of separation." This may perhaps be true but it cer- 

 tainly does not hold good here on the Pacific Coast where both 

 species are well represented from the Santa Cruz Peninsula to 

 the Columbia River. 



The inclusion of the parasitic fungi under the genera Buellia 

 and Lecidea is open to criticism as it would be a difficult matter 

 to prove them real lichens; the reviewer believes their omission 

 would have strengthened the work. The same is true of the 

 family Leprariaceae, composed of undeveloped or pseudolichens, 

 which are probably only common species which never develop 

 properly. Viewed in this way Amphiloma lanuginosum (p. 247) 

 is not to be regarded as a genuine lichen species. 



With the publication of such an admirable work as this by 

 the National Museum the future of the study of lichens seems 

 more promising than ever before in this country. With such a 

 manual at hand we may confidently look forward to a great in- 

 crease in the number of those who study this assemblage of re- 

 markable plants. Now if a few more local floras are prepared 



