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. 



