IV PREFACE. 



The addendum to Part VI. is compiled to agree in arrangement 

 with the previous portion, and the generic names used therein, 

 have for the same reason been kept almost unchanged. As in 

 Part VI., Dr. Kindberg is my authority, unless otherwise stated, 

 for the names of all species except those collected in Ontario in 

 1901, which were named by Mrs. E. G. Britton. I have, however, 

 freely availed myself of the work of this lady, Dr. A. J. Grout, 

 Dr. Best, Mr. Cheney and others. 



Dr. Kindberg's work has been of immense service in increasing 

 our knowledge of Canadian Bryology, as it was he, who, working 

 with Dr.C. Mueller, made known the great wealth of species in our 

 country, and by his invaluable assistance the writer was enabled 

 to separate many new forms from the mass of material which had 

 hitherto been overlooked or misnamed by other workers. A new 

 impetus was given to collecting, and since the publication of Part 

 VI., fully two hundred new forms have been added to our moss- 

 flora. In Part VI, 953 species were enumerated ; in the adden- 

 dum now published, the list is brought up to 1 196. and only a few 

 species have been discarded. It is quite true that some of Dr. 

 Kindberg's species have been shown to be only forms of other 

 species, but such corrections must be made in the work of all 

 botanists, and some of his critics, in proportion to their published 

 work, have been as great sinners in this respect as Dr. Kind- 

 berg. Dr. Kindberg's work was so far in advance of anything 

 that had been done in Canadian Bryology before his time that 

 there would be great injustice in withholding from him full credit 

 for what he has accomplished. 



Whenever genera have been monographed in recent years and 

 the loan of our herbarium sheets has been asked, they have been 

 freely lent, and in the body of the present work the changes 

 made by the writers of these monographs have been indicated. 



The specimens of cryptograms in the herbarium of the Geolo- 

 gical Survey number over 16,000, so that it will be seen that the 

 great majority of those referred to in Part VI and in the present 

 catalogue are in our own herbarium. The writer has been the 

 chief collector of these specimens, but many others have con- 

 tributed to both knowledge and material. As the collector's 

 name is in every case given after each citation, the amount of work 

 done by each is evident and no special reference need be made 

 to them here by name. 



