222 PROBLEMS OF FERTILIZATION 



EAST, E. M., AND PARKE, J. B. 



1917. "Studies on Self-Sterility: I, The Behavior of Self- 

 Sterile Plants," Geneties, II, 505-609. 

 FISCHEL, ALFRED. 



1906. "Ueber Bastardierungsversuche bei Echinodermen," 

 Arch, fur Entwickelungsmech., Band 22, pp. 498-525. 

 FUCHS, H. M. 



1914. See references at end of chapter v. 



1915. See references at end of chapter v. 

 GODLEWSKI, E. 



1906. " Untersuchungen iiber die Bastardierung der Echi- 

 nidden und Crinoidenfamilien," Arch, fur Entwickel- 

 ungsmech., Band 20, pp. 580-643. 

 GRAY, J. 



1913. "The Effects of Hypertonic Solutions upon the Ferti- 

 lized Eggs of Echinus (E. esculentus and E. acutus)," 

 Quart. Jour. Micr. Sci., LVIII, 447-81. 

 HERBST, CURT. 



1909. See references at end of chapter v. 



1912. See references at end of chapter v. 



HERTWIG, G. 



1913. "Parthenogenesis bei Wirbeltieren hervorgerufen 

 durch artfremden radiumbestrahlten Samen," Arch, 

 fur mikr. Anat. u. Entwicklungsgesch., Band 81, Abt. 

 II, pp. 87-127. 



HERTWIG, G. AND P. 



1914. " Kreuzungsversuche an Knochenfischen," Arch, fur 

 mikr. Anat. u. Entwickelungsmech., Band 84, Abt. II. 



HERTWIG, O. 



1913. "Versuche an Tritoneiern iiber die Einwirkung be- 

 strahlter Samenfaden auf die tierische Entwicklung," 

 Arch, fur mikr. Anat. u. Entwicklungsgesch. , Band 

 82, Abt. II, pp. 1-63. 

 HERTWIG, O. AND R. 



1885. "pxperimentelle Untersuchungen iiber die Bedingun- 

 gen der Bastard-Befruchtung," Jen. Zeitschr. filr Na- 

 turw., Band 19 (N.F. 12), pp. 121-65. 



