i82 PRESENT-DAY RATIONALISM 



directly adapted. In this way striking resemblances in ex- 

 ternal form have arisen between organisms living under similar 

 conditions although belonging to different archetypes. [Com- 

 pare Cactacece of Mexico with Euphorbias, Stapelias, etc., of 

 South Africa.] The progressive Evolution of the archetypes 

 as well as the direct adaptations to external conditions shown 

 by them [cultural experiments] are independent of selection." ^ 



M Text-book of Botany, Introduction, p. 3 (1903). I have already 

 called attention to Dr. Schimper's Botanical Geography on a Physiological 

 Basis. In other words, it is interpreted by " Adaptation to the Environ- 

 ment ". He was one of the contributors to this Text-book. 



