APPENDIX 199 



be found in all libraries. POULTON'S The Colors oj Animals gives the best 

 treatment of this interesting subject. GRANT ALLEN'S The Colours oj Flowers 

 suggests very interesting conceptions as to the evolution of the colors of blos- 

 soms. Its contentions are not fully admitted by botanists, but it is well worth 

 reading. 



If any of the readers of this Outline are interested to read further in regard 

 to evolution, the author would suggest that ROMANES' Darwin and Ajter Dar- 

 win, Vols. I and III and WALLACE'S Darwinism, followed by WEISMANN'S 

 Essays upon Heredity, would probably be the best books to read first, and with 

 these COULTER'S Plant Life and JORDAN and KELLOGG'S Animal Lije. 



