46 Where did Life Begin ? 



other hypothesis, for that matter, can or will 

 ever account for a likeness so much more 

 marked between certain plants and animals 

 of the eastern and western continents than 

 in the similarity of their surroundings, and 

 the antecedent conditions of their habitat. 



This marked similarity of the forms of life 

 in widely separated and dissimilar environment 

 is however possible, and only possible, in 

 case they once migrated from the same lo- 

 cality, and it is abundantly safe to add that, if 

 there is any one locality from which they all 

 could have migrated except a northern zone, 

 as herein described, it is yet to be discov- 

 ered. Under the most plausible supposition 

 of any other one locality, they certainly would 

 have had to pass through some part of this 

 northern zone to have reached their pres- 

 ent destination. This hypothesis, of both a 

 north and south movement in order to pass 

 from continent to continent presents to my 

 mind this dilemma. To suppose that plants 

 and animals took such long and circuitous 

 routes for the defined purpose of reaching 

 new fields and continents, is to endow them 



