Qux 
ceptions* 1$ that all forms of organized lite are not, and cannot be, 
equivalent to one another, for every group, form, or even individual, 
passes and had passed its own evolutional way in the past. As a result 
all forms described as ,species“, „гасез“, etc., are quite different and, 
incomparable inter se (рр. 67—71). The work of the [classifier in 
biology is the limitation of groups, i. e., the process of establishing 
differences (hiatus), and appreciating their quantity and quality. 
If taxonomically absent, the term ,species^, nevertheless, has a 
real value and is a firmly based conception, but of a bio-mechanical 
nature, indicating, first, the dependence of the outer form (latin: species) 
of the living substance from the inner forces of the organism and outer 
ones of the medium, and, second, the possibility of a separated and 
independent existence of groups of individuals (,species“) isolated 
from all others by these inner forces and by the outer form inevitably 
correlated with the former (pp. 71—72). Thus, the final result of the 
classificatory work is attained when for every differenciated group 
the direction of its evolution can be shown. 
Attempts of foundation of the conditional classificatory terms, 
such as species, race, genus, and others, on any morphological, or 
biological, character are based on a logical perversion. 
Lastly, facts obtained in modern biology point out that the conce- 
. ptions of sexual and of specific isolation are rather coiticident and that, ' 
therefore, the species-conception is in its intimate substance a conce- 
ption of sexual nature (рр. 76—79). 
Revue Russe d'Entom. XVIf. 117, 
