352 THE HISTORY OF CREATION. 



(1.) The palceontological history of the development of 

 organisms, the gradual appearance and the historical succes- 

 sion of the different species and groups of species, the 

 empirical laws of the palaeontological change of species, as 

 furnished to us by the science of fossils, and more especially 

 the progressive differentiation and perfecting of animal 

 and vegetable groups in the successive periods of the earth's 

 history. 



(2.) The individual history of development of organisms, 

 embryology and metamorphology, the gradual changes in 

 the slow development of the body and its particular organs, 

 especially the progressive differentiation and perfecting of 

 the organs and parts of the body in the successive periods 

 of the individual development. 



(3.) The inner caudal connection between ontogeny and 

 phylogeny, the parallelism between the individual history 

 of the development of organisms, and the palseontological 

 history of the development of their ancestors, a connection 

 which is actually established by the laws of Inheritance 

 and Adaptation, and which may be summed up in the 

 words : ontogeny, according to the laws of inheritance and 

 adaptation, repeats in its large features the outlines of 

 phylogeny. 



(4.) The comparative anatomy of organisms, the proof of 

 the essential agreement of the inner structure of kindred 

 organisms, in spite even of the greatest difference of external 

 form in the various species ; their explanation by the causal 

 dependence of the internal agreement of the structure on 

 Inheritance, the external dissimilarity of the bodily form 

 on Adaptation. 



(5.) Tlie inner causal connection between comparative 



