THE PROBLEM OF ACTIVATION 269 



HEILBRUNN, L. V. 



1913. "Studies in Artificial Parthenogenesis: I, Membrane 



Elevation in the Sea-Urchin Egg," Biol Bull., 



XXIV, 343-61. 

 1915. See references at end of chapter v. 



HENNEGUY, M. F. 



191 1. " Sur la parthenogenese experimental chez les amphi- 

 biens," Comptes rendus de VAcad. de Sci., T. 152, pp. 

 121-23. 



HERLANT, MAURICE. 



1917. "Le mechanism e de la parthenogenese experimen- 

 tale," Bull. sci. de la France el de la Belgique, Ser. 7, 

 T. 50, pp. 381-404. 



1913. "Etude sur les bases cytologiques du mecanisme de 

 la parthenogenese experimentale chez les amphi- 

 biens," Arch, de biol., T. 28, pp. 505-608. 



HINDLE, E. 



1910. "A Cytological Study of Artificial Parthenogenesis 

 in Strongylocentrotus purpuratus" Arch, ftir Entwick- 

 elungsmech., Band 31. 



JUST, E. E. 



191 5/7. See references at end of chapter v. 



LILLIE, FRANK R. 



1913. See references at end of chapter iv. 



1914. See references at end of chapter iv. 

 191 5<7. See references at end of chapter iv. 

 19156. See references at end of chapter iv. 



LILLIE, R. S. 



1908. "Momentary Elevation of Temperature as a Means 

 of Producing Artificial Parthenogenesis in Starfish 

 Eggs and the Conditions of Its Action," Jour. Exp. 

 ZooL, V, 375-428. 



1910. "The Physiology of Cell-Division: II, The Action 

 of Isotonic Solutions of Neutral Salts on Unfertilized 

 Eggs of Asterias and Arbacia" Am. Jour, of Physiol., 

 XXVI, 106-33- 



