1 82 PROBLEMS OF FERTILIZATION 



MALL, F. P. 



1918. "On the Age of Human Embryos," Am. Jour, of 

 Anal., XXIII, 397-422. 



MOORE, CARL. 



1916. "On the Superposition of Fertilization and Parthe- 

 nogenesis," Biol. Bull., XXXI, 137-80. 



1917. "On the Capacity for Fertilization after the Initia- 

 tion of Development," ibid., XXXIII, 258-95. 



MORGAN, T. H. 



1895. "The Fertilization of Non-nucleated Fragments of 

 Sea-Urchin Eggs," Arch, fur Entwickelungsmech., 

 Band 2, pp. 268-80, 



OKKELBERG, PETER. 



1914. "Volumetric Changes in the Egg of the Brook Lam- 

 prey, Entosphenus (Lampetra) Wilder i (Gage), after 

 Fertilization," Biol. Bull., XXVI, 92-99. 



PACKARD, CHARLES. 



1914. "The Effect of Radium Radiation on the Fertiliza- 

 tion of Nereis" Jour. Exp. Zool., XVI, 85-131. 



REIGHARD, J. E. 



1893. "The Ripe Eggs and the Spermatozoa of the Wall- 

 eyed Pike and Their History until Segmentation 

 Begins," Tenth Bienn. Kept. State Board of Fish 

 Comm. of Mich. Lansing. 



ROBERTSON, T. BRAILSFORD. 



191 2a. "On the Extraction of a Substance from the Sperm 

 of a Sea Urchin (Strongylocentrotus purpuratus) Which 

 Will Fertilize the Eggs of that Species," Jour, of 

 Biol. Chem., XII, i-u. 



191 2b. "Studies in the Fertilization of the Eggs of a Sea- , 

 Urchin (Strongylocentrotus} by Blood-Sera, Sperm, 

 Sperm-Extract, and Other Fertilizing Agents," Arch, 

 filr. Entwickelungsmech., Band 35, pp. 64-130. 



SCHUCKING, A. 



1903. See references at end of chapter iv. 



