rounded by a cortical portion containing Graafian follicles 

 seen in different stages of development. The framework or 

 stroma is composed of fibrous and non-striped muscle tissue. 

 A fully developed Graafian follicle consists of a dense sur- 

 rounding stroma; it is lined by the mem bran a granulosa 

 composed of several layers* of small cells; in one portion of 

 the follicle this lining is thickened to form the discus pro- 

 ligerus ; in this discus the ovum is embedded. The cavity 

 of the follicle is filled by the liquor folliculi. Other follicles 

 in different stages of development will also'be observed; in 

 some the ovum is surrounded by only a single layer of 

 cells; in others by several layers, while in still others the 

 cavity of the follicle may just be forming. The section 

 may show a portion of a corpus luteum. If this is well 

 developed, it will consist of a mass of quite large cells with 

 relatively small nuclei, between which a network ofcnpilla- 

 ries will be seen. Sketch several Graafian follicles showing 

 different stages of development, and a portion of the corpus 

 luteum if present, as seen under high power. 



(d) Uterus. 



A human uterus was divided into small pieces, hardened in 

 mercuric chloride, stained in Delafield's haematoxylin, embedded in 

 paraffin, and cross sections of the wall made. Fix to the slide, and 

 mount in balsam. 



Study first under low power. The uterus will show 

 mucous, muscular, and serous coats. The mucosa is com- 

 posed of loose fibrous tissue, and is covered by a layer of 

 ciliated columnar cells. In it are found the uterine glands, 

 simple or branched tubules lined by a layer of ciliated 

 columnar cells. The next coat is composed of non-striped 

 muscle tissue. Fibrous tissue is found between the muscle 

 bundles, also relatively large vessels. Sketch a portion of 

 the wall as seen under low power. 



(e) Vagina. 



The vagina of a dog was hardened in absolute alcohol, stained 

 in borax carmine, embedded in paraffin, and sectioned. Fix to the 

 slide, and mount in balsam. 



Use the high power. The vagina has three coats, an 

 inner mucous, composed of stratified pavement epithelium 



