LEE BARKER WALTON 125 



Walton, L. B. 



'14. The Evolutionary Control of Organisms and its Significance. Science, 

 Vol. 39, pp. 479-488. 



Warren, E. 



'99. An Observation on Inheritance in Parthenogenesis. Proc. Roy. Soc, Vol. 

 65, p. 154. 



Warren, E. 



'02. Variation and Inheritance in the Parthenogenetic Generations of the Aphis 

 Hyalipterus triphodus (Walker). Biamefrika, Vol. 1, p. 129. 



Weismann, A. 



'76. Studien ?ur Descendenz-Theorie. II. Ueber die Mechanische Auflassung 

 der Natur. Leipzig, W. Engelmann. 



Weismann, A. 



'84. Ueber Leben und Tod. Jena. 



Weismann, A. 



'86. Die Bedeutung der sexuellen Fortpflanzung fiir die Selektions-theorie. 

 Tagbl. Naturforsch. Jena. 



Whitney, A. 



'12. Reinvigoration produced by Cross Fertilization in Hydatina senfu. Journ. 

 Exper. Zool., Vol. 12, No. 3, pp. 337-362. 



Woodruff, L. L. 



'11. Two Thousand Generations of Paramecium. Arch. Protist., Bd. 21, pp. 

 263-266. 



