Proc. Roy. Soc. JEdin. 
[Vol. XXXI 
Fig. 1. 
x 20 Diam. 
Pig Embryo. 12 cm. Showing cortical and medullary zones. 
Fig. 4. 
Capsular Epithelium from Surface of 
Ovary of New-born Puppy. Oogonia 
seen in deeper layer. 
Fig. 2. (Diagram.) 
Pig Embryo. 14 cm. Showing nuclei 
in synaptic stages. A few primitive 
follicles are seen in medullary portion. 
Blood sinuses are also seen. 
Fig. 3. 
Oocyte from Pig Embryo. 14 cm. 
With follicle cells surrounding it. 
Dr Louise JV1 c Ilroy. 
Fig. 5. 
x 300 Diam. 
Surface of Ovary of New-born Puppy, showing 
capsular epithelium and cell nests. 
[Plate I 
