Shells of Paludina (after Neumayr) . 



A graduated series of forms showing one of the strongest evidences for 

 evolution. These changes certainly show one of two things: either each 

 change constitutes an independent separate act of special creation, or one 

 form gradually alters and merges into another. 



Is it more reasonable to think the forms would have been created to look 

 as if they were related — as if one were the slightly altered offspring of 

 another; as if they were a connected series — or that such a complete sequence 

 can only mean relationship ; that similarity of structure implies a common 

 origin? 



"The essence of evolution is unbroken sequence." Editor. 



The extremes (I, IX) would constitute separate species were the means 

 (II-X) not living contemporaneously. 



"The idea of evolution leaps to the eye when we look at a series like this." 



J. Arthur Thomson. 



