134 ESSAY ON CLASSIFICATION 



zoological provinces of uneequal extent exhibit thought, a close con- 

 trol in the distribution of the earth's surface among its inhabitants. 



10th. The identity of structure of these types, notwithstanding 

 their wide geographical distribution, exhibits thought, that deep 

 thought which, the more it is scrutinized, seems the less capable 

 of being exhausted, though its meaning at the surface appears at once 

 plain and intelligible to every one. 



11th. The community of structure in certain respects of animals 

 otherwise entirely different, but living within the same geographical 

 area, exhibits thought, and more particularly the power of adapting 

 most diversified types with peculiar structures to either identical 

 or to different conditions of existence. 



12th. The connection, by series, of special structures observed 

 in animals widely scattered over the surface of the globe exhibits 

 thought, unlimited comprehension, and more directly omnipresence 

 of mind and also prescience, as far as such series extend through a 

 succession of geological ages. 



13th. The relation there is between the size of animals and their 

 structure and form exhibits thought; it shows that in nature the 

 quantitative differences are as fixedly determined as the qualitative 

 ones. 



14th. The independence in the size of animals of the mediums in 

 which they live exhibits thought, in establishing such close connec- 

 tion between elements so influential in themselves and organized 

 beings so little affected by the nature of these elements. 



15th. The permanence of specific peculiarities under every variety 

 of external influences during each geological period and under the 

 present state of things upon earth exhibits thought: it shows also 

 that limitation in time is an essential element of all finite beings, 

 while eternity is an attribute of the Deity only. 



16th. The definite relations in which animals stand to the sur- 

 rounding world exhibit thought; for all animals living together stand 

 respectively, on account of their very differences, in different rela- 

 tions to identical conditions of existence, in a manner which implies 

 a considerate adaptation of their varied organization to these uni- 

 form conditions. 



17th. The relations in which individuals of the same species stand 



