ioo Species; or, Darwinism. 



ing their kind by fertile generation. This one 

 physiological attribute common to the members of 

 a species reveals an essential likeness among them 

 all, one deeper than proportion or structure, than 

 morphology or anatomy. It may not be patent to 

 the eye: it may not be discernible with the help of 

 the measure or scales. Yet consider, first, the 

 parents with respect to the offspring. Even suppos- 

 ing the likeness between them is not very apparent, 

 still it must be there, according to the law that 

 " Like begetteth like," and " No one gives what he 

 has not got." If the parents give, it is what they 

 have got that they give; and in every order in which 

 they give, in anatomy, morphology, physiology. 

 The resemblance passes down from the beings pro- 

 ducing to the beings produced, as the old philo- 

 sophical definition of generation clearly enunciates: 

 " The process of a living being from a living being, 

 unto a likeness of nature." Consider, secondly, the 

 parents themselves. Suppose that previously the 

 likeness between them was obscure. Yet, from the 

 moment they produce an offspring common to both, 

 that offspring is like to them, and they must be like 

 one another; according to the mathematical prin- 

 ciple, that things which are equal to the same are 

 equal to one another; and this, albeit nobody knew 

 of it before, perhaps because their color or stature 

 was different, or their origin, their antecedents or 

 concomitants generally. They were never different 

 species, if they are found to be capable of fertile 



