EVOLUTIONS OF ORGANIZATION. \\ 



type?" 1 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 seeing that, in this instance, one inde- 

 pendent thinker originated for himself both ideas 5 

 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 Philosophic Anatomique, II., p. 445, 



