523 



TABULAR SUMMARY POSTPONED. 



In the introductory explanations to this cui-rent volume, 

 page first, it was intimated that a tabular summary of the 

 leading facts of species-distribution would be given here, 

 provided sufficient space shovdd remain for it. This is 

 now found not to be the case. The Additional Sj)ecies 

 and Notes have occupied more pages than were then cal- 

 culated as likely to be required for the supplementary 

 matter. And besides this demand for space, the necessity 

 of an Index to the Species has been strongly brought 

 imder the attention of the Author, spread as they are 

 through thi-ee volumes, and many of the species bemg 

 again mentioned in this thii'd volume, although treated in 

 one of the two former volumes. An index to the genera 

 merely would have been foimd comparatively useless, 

 by reason of the second mention of so many species, and 

 on account of the many pages required for some of the 

 long genera, as Carex and Hieracium. But an index to 

 species, or further to the generic and specific names used, 

 is unavoidably long and space-filling ; and thus the present 

 volume is rendered considerably thicker than the two 

 preceding volumes, although the desired tabular summaiy 

 is postponed to volume fourth, or possibly may need to 

 be abandoned altogether. 



