ARISTOTLE 



736 a 



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^ vararov P : varepov vulg. 

 ^ Buss. : ovra x^picra Piatt. * wXriv el Piatt. 



"e.g., wind-eggs, Bk. III. 



* De anima, Bk. II, ch. 4 ; and see 735 a 13 ff. above. 

 . ' These are two instances of the rule that there are definite 

 stages in the development or formation of living things. 

 Nutritive Soul (the mark of a living thing) is acquired before 

 sentient Soul (the mark of an animal), just as the formation 

 of an animal precedes the formation of any particular species 

 of animal. Cf. von Baer's " biogenetic law," that the char- 

 acter of the class is acquired before that of the genus, and that 

 of the genus^before that of the species. (K. E. von Baer, 



166 



