432 Scientific Intelligence. 
_ It is manifest that the expression of the multiplied relations, existing 
between all these terms will be obtained, if on the one hand, the terms 
of the various series, A, a, a, B, b, b, &e., are placed in apposition 
to each other. The parallellic classification satisfies these two conditions 
by the following oe simple wa to be seized at a glance: 
A A 
B 3 " B 
C c e C 
D d d D 
EH e e E 
f 
Ff f F* 
7.) There . so to speak, parallelisms of all degrees. The species 
of one and the e genus, the genera of one and the same family, often 
form parallel eat it is sometimes thus (to go no higher) with the 
classes of the same branch. The word type, just now employed, may 
then receive any given value, provided that by group is understood a 
division of the degree immediately superior 
The parallellic classification has been, for eighteen years, (in ae | 
applied by various authors to the greater part of the branches of Zool- 
ogy, Anthropology, Feratology and Botany. 
Il. Summary of lessons on the question of species. 
The characters of species are not absolutely fixed, as many have 
said, still less indefinitely varied, as others have i They are 
fixed for each species, so long as it is perpetuated in the midst of the 
same ok aaa “iiey become modified if the surrounding circum- 
stance ~~ 
(2.) 5 ihe latter case, the new characters of the species are, 80 
speak, ihe resultant of two contrary forces; the one m modsfyings is the 
influence of the new surrounding circumstances ; the other 
of the type, is the pedepesit tendency to reproduce the same prqtsnen 
from generation to genera 
In order that the wae influence should predominate, in a very 
marked manner, over the conservative tendency, it 1s necessary then that a 
species should pass from the circumstances in the midst of which it was 
living, into a new and a different totality ape ange ; that i 
should change, as has been said, its surrounds 
‘3 ) ee the very narrow limits of the = observed amongst 
wi A anim 
nce also the extreme variability of domestic animals. ae 
(4) Amongst the former, Anne remain generally in the places «a 
the conditions where they are established, or remove from them as li od 
as possible; for their organization is in harmony with these places an 
conditions, and would be in disagreement with other surrounding 
ces, 
* For greater simplicity we e here supposed the four eeries equally extended, 
dl eokees Py In reat it. scarcely everso. For hea adage gis 
4,3, D,£, Bs 0 ds f de series are not the less y : 
i? Fay Moder Moc 
