306 NEW PUBLICATIONS. 
from one another being indicated by means of italics, and the descrip- 
tive portion of the work being followed by an analytical key, con- 
structed upon the same plan as those given in Boreau’s ‘ Flore du 
Centre,’ 
The point suggested by the works upon which we feel most inclined 
to remark, is the question of what is the proper rank in the scale of 
nature, and what the relationship to each other of the individualities 
characterized in them. Since Weihe and Nees von Esenbeck pub- 
lished the * Rubi Germanici, the authors of floras and monographs for 
tracts of country in Central and Western Europe fall easily into 
three sets, in the plan they have followed in dealing with Brambles. 
First come those who, like Koch and Bentham, treat Rubus fruticosus 
as a single undivided species. The second and most numerous class 
follow Weihe and Nees in admitting and cbaracterizing a comparatively 
limited number of so-called species. To this second class belong 
Arrhenius and Fries in Scandinavia, Dumortier in Belgium, Wimmer 
and Von Garcke in Germany, Godron in France, and Mercier in 
Switzerland; and in Britain Professor Babington having made his . 
début as a fair average representative of this class, has in no way 
changed his position through the course of his successive writings, his 
present work, as regards the general plan of species-limitation, being 
quite in accordance with the Synopsis of 1846. And we have a third 
class of authors to which belong P. J. Miiller and Wirtgen (as tested 
by his fasciculus) in Germany, and which, by his present work, M. 
Genevier represents for France, who acknowledge and define a very 
much larger number of what they also call * species." 
The following passage will show clearly in what light M. Genevier, 
as representing the third class, regards the species which he has esta- 
blished and characterized. 
* In the introduction to his ‘ Diagnoses’ of new and misunderstood 
species," M. Jordan says, ‘ We have not in our researches quitted for 
a single instant the domain of positive reality. It is not theories, but 
material facts that we have to furnish; it is not a certain manner of 
viewing things, or a particular opinion that we are going to express, 
but facts well and duly proved by the ordinary process of experience 
that we proceed without fear to submit to the examination of all 
friends of science. We have simply to unfold that which we have 
seen, experimentalized upon, proved, that which even those who are 
