BLOOD VESSELS OF THE MAMMARY GLAND 



517 





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Fig. 1 Cross-section through the skin of a rabbit embryo 23 mm. long, show- 

 ing the aniage of a mammary gland and sections of several blood vessels. Magn. 

 66 diam. 



Fig. 2 Mammary gland of a newborn rabbit, seen from below; the epidermis 

 and nipple have been removed from the piece of skin in which the gland lies. The 

 skin has been lightly stained with carmine, cleared and mounted in balsam. The 

 blood vessels are injected; the veins are shown lighter colored than the arteries; 

 no attempt has been made to show the capillaries. The smaller ducts of the 

 gland have been bent back over the nipple area in mounting the specimen and 

 are shown darker than the rest of the gland ; length of longest duct, 2 mm. Magn. 

 8 diam. 



