156 Cells; or, Evolution. 



earth more and more suited for the development of 

 higher types, then, to use the historical language of 

 Moses, was the proper age of the lower animals, 

 " those that swarm in the waters, and the creeping 

 and flying species of the land." They were all 

 over the face of creation, and they represented in 

 comprehensive groups the main types of nature. 

 This is the fifth day of Moses. In the plant and 

 animal kingdoms alike, the sub-kingdoms are all 

 present; the grand divisions are defined. The 

 specimens, which are representative of such divis- 

 ions, look perhaps somewhat as if they were a com- 

 mon type of many other different forms, which 

 are more specialized and yet to come. But that 

 is always the case with things less perfect: they 

 are more common or general. A generic likeness 

 agrees with all its specific forms in a negative 

 way, inasmuch as it does not exhibit the perfec- 

 tions which the specialized forms display. 



172. In the more imperfect conditions of life, the 



more common type is the precursor of its 



^•\i> a + : betters in better conditions which now 



First Part. 



follow. The mammals begin to be; or, 

 in the terms of Moses, " the beasts of the earth ac- 

 cording to their kinds are brought forth, and cattle, 

 and everything that creepeth (or prowleth) on the 

 earth." It is to be observed, however, that pre- 

 cursor does not mean ancestor. And the prog- 

 ress of species does not mean the descent of 

 species. 



