FERTILIZATION ON PARTHENOGENESIS 179 



Robertson, T. B. 



'12 On the Extraction of a Substance from the Sperm of a Sea-urchin (Stron- 

 gylocentrotus purpuratus) which will Fertilize the Eggs of that Species. 

 Jour. Biol. Chem., Vol. 12. 

 Tennent, D. H. and Hogue, M. J. 



'06 Studies on the Development of the Starfish Egg. Jour. Exp. Zool., Vol. 3. 

 Von Knaffi. 



'08 Ueber die Beziehungen zwischen Lipoidverflussigung und Cytolyse. 



Pflugers Archiv, Vol. 123, p. 279. 

 Wilson, E. B. 



'03 Experiments on Cleavage and Localization in the Nemertine Egg. Archiv., 

 f. Entw" Mech. d. Organismen, Bd. 16, pp. 411-460. 



