REFERENCES TO LITERATURE 321 



Harmer, S. F. 1893. On the Occurrence of Embryonic Fission 

 in Cyclostomatous Polyzoa. Quart. Journ. Mic. Sci. Vol. 34. 



Hartmann, M. 1902. Ovarialei und Eireifung von Asterias 

 glacialis. Zool. Jahrb. Bd. 15. 



Hasper, M. 1911. Zur Entwicklung der Geschlechtsorgane 

 von Chironomus. Zool. Jahrb. Bd. 31. 



Hegner, R. W. 1908. The Effects of Removing the Germ- 

 Cell Determinants from the Eggs of Some Chrysomelid 

 Beetles. Biol. Bull. Vol. 16. 



1909a. The Origin and Early History of the Germ Cells 



in Some Chrysomelid Beetles. Journ. Morph. Vol. 20. 



19096. The Effects of Centrifugal Force on the Eggs of 



Some Chrysomelid Beetles. Journ. Exp. Zool. Vol. 6. 



1911a. Experiments with Chrysomelid Beetles. III. 



The Effects of Killing Parts of the Eggs of Leptinotarsa 

 decemlineata. Biol. Bull. Vol. 20. 



19116. Germ-Cell Determinants and their Significance. 



Amer. Nat. Vol. 45. 



1912. The History of the Germ Cells in the Paedogenetic 



Larva of Miastor. Science. Vol. 36. 



1914a. Studies on Germ Cells. I. The History of the 



Germ Cells in Insects with Special Reference to the Keim- 

 bahn-Determinants. II. The Origin and Significance of 

 the Keimbahn-Determinants in Animals. Journ. Morph. 

 Vol. 25. 



19146. Studies on Germ Cells. III. The Origin of the 



Keimbahn-Determinants in a Parasitic Hymenopteron, 

 Copidosoma. Anat. Anz. Bd. 46. 



Henking, H. 1891. Untersuchungen liber die ersten Entwicke- 

 lungsvorgange in den Eiern der Insekten. Zeit. wiss. Zool. 

 Bd. 51. 



Herbst, C. 1894-1895. Ueber die Bedeutung der Reizphysi- 

 ologie fiir de causale Auffassung von Vorgangen in der 

 thierischen Ontogenese. Biol. Centrlb. Bd. 14, 15. 



Herold, M. 1815. Entwicklungsgeschichte der Schmetter- 

 linge, anatomisch und physiologisch bearbeitet. Kassel 

 und Marburg. 



