EVOLUTIONS OF ORGANIZATION. II 
type?”! and subsequently arrives at the doctrine that 
“all animals are made on one and the same type.” 
Founding on observation, this great anatomist ap- 
preciated not only the correspondence of part with 
part in different animals, but the existence of inher- 
ent laws of symmetry and order governing the 
formation of structures similar in different animals 
and hereditarily transmitted. To express it in the 
distinct nomenclature of Owen, he recognized the 
existence of general as well as special homologies. 
The compeer of Lamarck, he saw reason, even 
before that writer, to judge that the dogma of 
immutability of species, in all time and circum- 
stances, lacked proof; and, at a period later than 
Lamarck’s work, he cast it aside, thus affording 
evidence to those who may require it that the ap- 
preciation of the orderly internal laws of organi- 
zation is not inconsistent with a full appreciation 
of the possibility of a genetic connection of diverse 
forms —eeing that, in this instance, one inde- 
pendent thinker originated for himself both ideast 
and clearly perceived that the second could in no 
degree allow the first to be dispensed with. His 
notion was, that the “ambient world having under- 
gone changes from one geological epoch to another, 
even the atmosphere having varied in chemical 
1 Philosophie Anatomique, II., p. 445, 
