178 Proceedings of the Koyal Society of Edinburgh. [Sess. 
Fig. 17. Kitten , seventeen days old , drawing, 6 oc. J, cortex stroma cells isolat- 
ing capsular epithelium. Large oocytes seen. 
Fig. 18. Kitten , three months old , photo, x 250 d., showing nests of large 
oocytes. Two follicles seen, one containing an oocyte and one without. 
Fig. 19. Human foetus, four months old, schematic drawing. Cells aggregated 
near the surface. Oocytes in various stages are seen. Some follicles near the 
centre; (c) cortex; ( bl .) blood sinus. 
Fig. 20. New-born human ovary, photo, x 1000 d., showing follicle containing 
two oocytes. The chromatin filaments have a beaded appearance. 
Fig. 21. Rabbit embryo, twenty-six days\ x 600 d., showing differentiation of 
capsular epithelium on surface. The larger nuclei underneath are oocytes in 
reticular stage. 
Fig. 22. Rabbit, four days old, photo, x 400 d., cortex showing capsular 
epithelium and cell nests. 
{Issued separately December 29, 1910.) 
