162 Edward Kindle 



LEFEVRE, GEORGE. 



1907. Artificial Parthenogenesis in Thalassema Mellita. Journ. Exp. Zool. 



Vol. 4. pp. 91149. 

 LOEB, J. 



1905. On an Improved Method of Artificial Parthenogenesis. Univ. Cal. 



Publ., Phys. Vol. 2. pp. 113123. 



1906. Versuche tiber den cheinischen Charakter des Befruchtungsvorganges. 



Biochemische Zeitschrift. Vol.1, pp. 183 207. 



1906. Weitere Beobachtungen uber den EinfluB der Befruchtung und der 

 Zahl der Zellkerne auf die Saurebildung im Ei. Biochemische Zeit- 

 schrift. Vol.2, pp. 34-43. 



1909. Die chemische Entwicklungserregung des tierischen Eies. Berlin. 



(This book contains a complete summary of LOEB'S previous 

 work on artificial parthenogenesis.) 



1909. Uber das Wesen der formativen Reizung. (Vortrag gehalten auf dem 



XVI. International Medizinischen KongreC in Budapest.) Berlin. 

 MORGAN, T. H. 



1896. The Production of Artificial Astrospheres. Arch. f. Entw.-Mech. Vol. 3. 

 pp. 339361. 



1899. The Action of Salt-Solutions on the Unfertilized and Fertilized Eggs 



of Arbacia. Arch. f. Entw.-Mech. Vol. 8. pp. 448539. 



1900. Further Studies in the Action of Salt-Solutions and other Agents on 



the Eggs of Arbacia. Arch. f. Entw.-Mech. Vol. 10. pp. 489524. 

 PETRUNKEWITSCH, A. 



1904. Kiinstliche Parthenogenese. Zool. Jahrb. Suppl. 7. Festschrift fur 



WEISMANN. pp. 77138. 

 SCOTT, J. W. 



1906. Morphology on the Parthenogenetic Development of Amphitrite. Journ. 



Exp. Zool. Vol. 3. pp. 4997. 

 TENNENT, D. H., and HOGUE, M. J. 



1906. Studies on the Development of the Starfish Egg. Journ. Exp. Zool. 



Vol.3, pp. 517-540. 

 WASSILIEFF, 0. 



1902. Uber kiinstliche Parthenogenesis des Seeigeleies. Biol. Centralblatt. 



Vol.22, pp. 758-772. 

 WILSON, E. B. 



1901. Experimental Studies in Cytology. I. Arch. f. Entw.-Mech. Vol. 12. 



pp. 529596. 



Explanation of the Figures, 



The figures are drawn to a magnification of 750 diameters with the ex- 

 ception of Fig. 11, which is magnified 1500 diameters. In all cases the drawings 

 were made from sections stained by one of the three methods described above. 



Plate V. 



Figs. 111. Various stages in the development of eggs of S. purpuratus 

 chemically fertilized by means of butyric acid, followed by treatment with a 

 hypertonic salt solution. 



