ZOOGENESIS 



knowledge of the structure of any creature is essential 

 to the determination of its position in relation to the 

 other animals. But those who study animals both in 

 the field and in the laboratory soon become aware of 

 the important fact that no animal form can properly 

 be understood from the facts revealed by the study 

 of its structure and anatomy alone. An animal is 

 something more than the sum total of the organic 

 compounds, the secretions and the deposits that make 

 up its body. There is something in addition to the 

 tangible physical complex represented by its structure 

 and anatomy. 



The bodily mechanism of every animal in life is 

 operated and controlled by a mental mechanism which 

 as yet we are unable to explain in terms of physics 

 and of chemistry. In each sort and kind of animal 

 this mental mechanism takes the form of a definite 

 complex peculiar to the species. 



These mental complexes are as much a part of the 

 individuality of each species as are the tangible struc- 

 tures of the body. To base our conclusions upon a 

 single set of characters and to dismiss others as irrele- 

 vant is simply to confess our inability to comprehend 

 and to interpret the whole in its true relations. 



Descriptions of the different breeds of dogs would be 

 considered wholly incomplete without some mention 

 of the mental traits of each. This is because we 

 appraise the dogs on the basis of all the characters 

 which enter into their relations to us. The diverse 

 mental traits peculiar to the different breeds of dogs 

 therefore become a matter of great interest. 



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