CONCLUDING REMARKS. 535 



individuals even of the same species are exactly alike in 

 every particular, and yet that each one of all these un- 

 counted millions bears within itself the stamp of a Ra- 

 diate, or a Mollusk, or an Articulate, or a Vertebrate, so 

 clearly, that, by patient study, the student of nature is 

 able to refer every one of to-day, and of bygone ages, to 

 its appropriate type, we are impressed with the great 

 truth that in the Animal Kingdom - - and it is so in all 

 nature there is the greatest possible diversity, and that 

 in all this diversity there is perfect unity ; and hence we 

 are forced to believe that all the animals of the past, and 

 all those of the present, have been created according to a 

 plan wrought out in the Divine Mind before the founda- 

 tion of the world. 





