- 382 
Figure 35. 
Figure 36. 
Figure 37. 
Figure 38. 
Figure 39. 
Figure 40. 
Figure 41. 
Figure 42. 
Figure 43. 
Figure 44. 
Figure 45. 
DR FOULIS ON THE DEVELOPMENT OF THE OVA, ETC. 
An ovum still farther advanced in development, completely surrounded by a wreath of 
corpuscles, which have been derived from the fusiform corpuscles of the stroma (J). 
This wreath is the membrana granulosa (7’) seen in section. 
A Graafian follicle from which the ovum has been removed. The membrana granulosa (7) 
is seen in section. 
A section through a Graafian follicle, and the nearly ripe ovum contained in it. The 
membrana granulosa (7) consists of several layers of corpuscles. The zona pellucida (s) 
is well developed, and the yelk substance (¢) at its peripheral part contains numerous 
bright granules and particles. 
A section through the membrana granulosa and wall of a ripe Graafian follicle just before 
bursting. The membrana granulosa (7) consists of several layers of corpuscles. Each 
corpuscle is a large nucleus surrounded by protoplasm (wv). In the wall of the follicle 
outside the membrana granulosa the fusiform corpuscles of the stroma (j) are very 
large. (Page 371.) 
A section through the egg zone of an old cat’s ovary. The stroma (j) consists almost 
entirely of fusiform corpuscles. Around the young eggs (m) the fusiform corpuscles (7) 
of the stroma may be traced in their development into the eorpuscles of the membrana 
granulosa. (Page 369.) 
The epithelium (f,) from the surface of the same cat’s ovary. 
The epithelium (#,) from the surface of the ovary of a child six years of age. 
The same epithelium more highly magnified showing the “grooved” appearance of the 
corpuscles. 
Germ epithelial corpuscles (2) seen in profile. From the ovary of a 74 months’ human 
foetus. ; 
A primordial ovum (m) surrounded with fusiform corpuscles (n). From the stroma of the 
same ovary. 
An ovum (#) from the deeper parts of the same ovary, showing the appearance of the mem- 
brana granulosa (7) when first formed round the ovum. 

