366 



that they origiaated from any one ovum, whereas it is quite con- 

 ceivable that the connective tissue might include these in one theca. 

 So that on the whole the evidence appears to be in favour of the 

 view that polyovular follicles result from the inclusion of two or 

 more ova in one follicle. 



Two kinds of such follicles may be recognised, firstly those in 

 "which the ovules are closely apposed and secondly those in which 

 they are separated by the cells of the membrana granulosa. Both 

 these are readily explicable on the inclusion hypothesis. In the first 

 case the primitive membrana granulosa includes the egg-cells which 

 do not afterwards separate and in the second case, although the 

 membrana granulosa penetrates between the ovules, the conjunctive 

 tissue does not and so they are still included in one theca. 



List of References. 



1. Ancel and Bodin, "Sui- les Homologies et la Signification des Glandes ä 

 Secretion interne de I'ovaire". Comptes Kend. de la Soc. Biol. 1909. 



2. VON Baeb, "De ovi Mammalium et Hominis Genesi Epistola". Lipsiae 

 1827. 



3. Belloy, G, "Recherches sur I'origine des corps jaune de I'ovaire chez le 

 rat et le cochon d'Inde". Compt. Rend. Assoc. Anat., Paris 1899. 



4. VAN Beneden, E., " Contribution a la connaissance de I'ovaire des mammi- 

 feres. L'ovaire du Vespertilio murinus et du Rhinolophus ferrum-equinum". 

 Arch, de Biol. 1880. 



5. BisCHOFF, "Entwicklungsgescliichte des Kanincheneis". Braunschweig 1842. 



6. BouiN, P., "Figures caryocinetique des cellules des corps jaunes de I'ovaire 

 du cobaye". Compt. Rend, de la Soc. Biol. 1898. 



7. — P. and M., '' A propos du follicule de Graaf des mammiferes-Pollicules 

 polyovulaires — Mitoses de maturation prematurees". Compt. Rend, de la 

 Soc. Biol. 1900. 



8. Hill, J. P., "The early development of the Marsupialia with special 

 Reference to the Native Cat (Dasyurus viverrinus) ". Quart. Journ. Micr. 

 Sei. 1910. 



9. Honors, C, " Recherches sur I'ovaire du Lapin ". Arch, de Biol. 1900. 



10. Jankowski, J., "Beitrag zur Entstehung des Corpus Luteum der Säuge- 

 tiere''. Archiv f. Mikr. Anat. 1904. 



11. LoEB, L., "A note on the Occurrence of Mitosis in the Corpus Luteum 

 of the Guinea-pig". Anat. Record 1908. 



— "The formation of the Corpus Luteum in the Guinea-pig''. Journ. American 

 Med. Assoc. 1906. 



— "über die Entwicklung des Corpus Luteum beim Meerschweinchen". 

 Anat. Anz. 19Ü6. 



