No. 535] GERM-CELL DETERMINANTS 



bodies, since their bearing upon theories of heredity 

 fundamental importance. 



LITERATURE 



Allen, B. M., 1906. The Origin of the Sex-Cells of Chrysemys. 



Ges. f. M„r,,h. I'has,,,!. .1/ ihirlx „. H.I. 8. 

 Buchner, P., 1910. Keimbahn und Ovogenese von Sagitta. Anat. Am., 

 Bd. 35. 



Calkins, G. N., 1909. Protozoology. Philadelphia. 



Dobell, C. C, 1909. Chromidia and the Binuclearity Hypothesis: a Review 



Eigenman, C, 1892. On the Precocious Segregation of the Sex-Cells of 



Elpatiewsky. AV.. u...;.. ri-.^.'hlechtszellenbildung bei Sagitta. Anat. 



Am., Bd. 35. 



Geddes, P., and Thomson, J. A., 1889. The Evolution of Sex. London. 

 Haecker, V., 1897. Die Keimbahn von Cyclops. Arch, MiJcr. Anat., 

 Bd. 49. 



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

 nants from the Eggs of Some Chrysomelid Beetles. Biol. Bull., Vol. 16. 



Hegner, K. W., 1909. The Origin ami Early History of the Germ Cells 

 in some Clirysnin.-li.l H.-Hlrs. J,,„n,. Mnrph.. Vol. 20. 



toiM. Zool., Bd. 16. 

 Morgan, T. II., 1910. Chromosomes ami Heredity. American Naturalist, 



Nussbaum, J., 1880. Zur Differenzirung des Geschlechts im Thierreich. 



vens, N. M., 1910. Further 

 Joum. Morph., Vol. 21. 



