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DESCRIPTION OF FIGURES. 

 (The figures were drawn by Mr. Parker, of the Cambridge University Press.) 



Plate 1. 



Fig. 1. — Section through pro-cestrous uterine stroma (high power). The figure represents 

 a portion of the deeper part of the stroma where extravasated blood 

 corpuscles were not present. In the more superficial part underlying the 

 surface epithelium such corpuscles were abundant. The uterine glands 

 show a high columnar epithelium. 



Fig. 2. — Section through uterine stroma of Bitch No. 3 (high power). The glands are 

 very well developed and closely packed, there being comparatively little 

 intervening connective tissue. The glandular epithelium is columnar. Blood- 

 vessels are fairly numerous. 



Plate 2. 



Fig. 3. — Section through uterine stroma of Bitch No. 6 (high power). The glands have 

 undergone a change. The epithelium is now usually cubical. The lumina 

 contain colloid and sometimes what appear to be desquamated epithelial 

 cells. 



Fig. 4. — Section through uterine mucosa of Bitch No. 7 (low power). The glands are 

 for the most part in a state of degeneration. Their lumina contain colloid, 

 together with the remains of epithelial cells. Extravasated blood is present 

 in the stroma. 



Plate 3. 



Fig. 5. — Section through mammary tissue of Bitch No. 5 (high power), showing alveoli. 

 Fig. 6. — Microphotograph (low power) of section through mammary tissue of Bitch No. 4, 



showing ducts, alveoli, and a quantity of adipose tissue. 

 Fig. 7. — Microphotograph (low power) of section through mammary tissue of Bitch No. 5, 



showing numerous alveoli undergoing proliferation. Some ducts are also 



shown. 



