BARNES NORTH AMERICAN MOSSES. vii 



present names nor the autonomy can be maintained. But 

 it enables us to avoid constructing new names in this pub- 

 lication, so that it need not be cited in the future litera- 

 ture of taxonomy. 



This list also saved us much labor of compilation, both of 

 names and of geographical distribution. Only such changes 

 were made in the species included as seemed warranted by 

 the special studies before mentioned. To the species 

 therein enumerated we have added those described since 

 its publication up to January 1, 1896. 



We have departed from this list and published mono- 

 graphs in only two genera. InDicranum we have used 

 the results of the study of Barnes and True, and in Am- 

 Uystegium those of Cheney (both at present unpublished), 

 so far as the omission of certain species of these genera 

 is concerned. We have not included some new species yet 

 in MSS. , believing that this bulletin is not a suitable place 

 for publishing them. 



It is scarcely necessary to add that no attention has been 

 paid to nomina nuda. 



CITATIONS. 



For the sake of brevity we have cited Macoun's Catalogue 

 of Canadian Plants, Part VI. Mosses, by Macoun and Kindberg, 

 simply as Mac. Cat., to which its independent paging lends 

 itself. Likewise Rabenhorst's Kryptogamen- Flora von Deutsch- 

 land, (Esterreich und der ScJiweiz, Part IV. Die Laubmoose, by 

 Limpricht, is cited as Limpr. Laubm. Other citations are 

 given in full or with abbreviated accurate titles. In all 

 cases we have cited the original publication of Renauld and 

 Cardot's Musci America? Septentrionalis in the Revue 

 Bryologique. 



ACKNOWLEDGMENTS. 



Upon Mr. Heald has fallen the bulk of the work of col- 

 lating the list of species to be included and selecting the 

 descriptions to be reprinted. Many of the latter are trans- 



