55 Miss J. E. Lane-Claypon. On the Origin, etc., of [June 16, 



4. About the twenty-third day some of the interstitial cells become cut off 

 near the periphery and pass through the nuclear transformations of ovogenesis, 

 becoming true ova. 



I wish to express my deep obligation to Professor Starling, under whose 

 supervision this research has been carried out, and without whose never- 

 failing assistance, interest, and sympathy at each step of the work 

 it would have been impossible to carry out the investigations described 

 above. 



Also I desire to thank Mr. H. G Plimmer for his kindness in giving me 

 much valuable information in regard to the carrying out of the histological 

 details. 



BIBLIOGRAPHY. 



1. Amann, ' Verhandlung der Ges. Deutsch. Naturf. und Arzte in Miinchen,' 71 Vers., 



vol. 2, 1899. 



2. Ancel and Bouin, ' Coruptes Rendus Soc. de Biol.,' 1903 and 1904. 



3. Andrews, ' Journ. of Obst. and Gyn. of British Empire,' May, 1904. 



4. Balfour, ' Quart. Journ. Micros. Science,' 1878. 



5. Van Beneden, 'Arch, de Biol.,' vol. 1, 1880. 



6. Born, ' Arch. f. Anat.,' 1874. 



7. Biihler, ' Zeit. f. Wissen. Zool.,' 1894. 



8. De Foulis, ' Quart. Journ. Micros. Science,' 16, ser. 3, 1876. 



9. P. Fraenckel, ' Arch. f. Gynak.,' vol. 68, part 2, 1903. 



10. Heape, ' Boy. Soc. Proc.,' April, 1905. 



11. His, 'Arch. f. Mikros. Anat.,' vol. 1, 1865. 



12. Koster, ' Meded. der Kon. Akad. der Wetenschappen,' 2 reek, teel 3, 1868 



13. Macleod, 'Arch, de Biol.,' vol. 1, 1880. 



14. Nagel, ' Arch. f. Mikros. Anat.,' vol. 31, 1888. 



15. Pfluger, (1) ' Allgem. Medizin. Centralzeitung,' 1861 and 1862 ; (2) Uber die Eierstocke 



der Saugethiere und des Menschen,' 1867. 



16. Schron, 'Zeit. f. Wissen. Zool.,' vol. 12, 1863; 'Inaug. Dissert, der Med. Facultat 



zu Erlangen,' 1862. 



17. Wagener, 'Arch. f. Anat. u. Phys. Anat.,' Abthg., 1879. 



18. Waldeyer, ' Eierstock und Ei,' Leipzig, 1870. 



19. v. Winiwarter, ' Arch, de Biol.,' Liege, 1900. 



20. Wendeler, ' Martin's ' Die Krankheiten der Eierstocke und Eier,' Leipzig, 1899. 



For further literature on the early history of the ova see : 



Von Baer, ' De Ovis Animalium et Hominis Generi,' 1827. 



Barry, 'Phil. Trans.,' London, 1838. 



Billroth, 'Muller's Arch.,' 1856. 



Bischoff, ' Bau des Menschlichen Korpers,' Sommering, 1842. 



Borsenkow, ' Wiirz, Naturwissen. Zeitschrift,' vol. 4, 1863. 



Coste, ' Embryogenie Compared/ p. 80. 



De Graaf, ' De Mulierum Organis Generatioui Inservientibus,' 1668. 



Grohe, ' Virchow's Arch.,' vol. 26. 



