NEOLAMARCKISM 35)5 



(lines and spots) were due to light or shade, with 

 the general result of protective mimicry, or adapta- 

 tion to tree-life. 



"5. As the result of some unknown factor some 

 of the hypodermic cells at the base of the spines 

 became in certain forms specialized so as to secrete 

 a poisonous fluid. 



" 6. After such primitive forms, members of dif- 

 ferent families, had become established on trees, 

 a process of arboreal segregation or isolation would 

 set in, and intercrossing with low-feeders would 

 cease. 



" 7. Heredity, or the unknown factors of which 

 heredity is the result, would go on uninterruptedly, 

 the result being a succession of generations perfectly 

 adapted to arboreal life. 



" 8. Finally the conservative agency of natural 

 selection operates constantly, tending towards the 

 preservation of the new varieties, species, and gen- 

 era, and would not cease to act, in a given direction, 

 so long as the environment remained the same. 



" 9. Thus in order to account for the origin of 

 a species, genus, family, order, or even a class, the 

 first steps, causing the origination of variations, were 

 in the beginning due to the primary (direct and indi- 

 rect) factors of evolution (Neolamarckism), and the 

 final stages were due to the secondary factors, segre- 

 gation and natural selection (Darwinism)." 



From a late essay * we take the following extracts 

 explaining our views: 



" In seeking to explain the causes of a metamor- 

 phosis in animals, one is compelled to go back to the 



* " On the Inheritance of Acquired Characters in Animals with a 

 Complete Metamorphosis." Proceedings Amer. Acad. Arts and Sci- 

 ences, Boston, xxix. (N. S., xxi.), 1894, pp. 331-370; also monograph of 

 " Bombycine Moths," Memoirs Nat. Acad. Sciences, vii., 1895, p. 33. 



