



378 



.^ }^ /^ 



0. ves. 



• e. interves. 

 c.t. 





Fig. 3. Thyroid of dog, thirty two days after removal of all four parathyroids. 

 The vesicles have become very irregular in shape and there seems to be an increase in 

 the intervesicular epithelial tissue. ^ 120. ves. vesicle, e.ves. epithelium lining ve- 

 sicles, e.interves. intervesicular epithelial tissue, c.t. connective tissue, eves. coUoid 

 vesicle, c, colloid. Compare with Fig. 4. 



Fig. 4. Normal thyroid of a dog, for comparison with Fig. 3. c, colloid, e.ves. 

 epithelium lining vesicles, e.interves. epithelial intervesicular tissue, c.ves. colloid ve- 

 sicle. X 120. 



e. interves. 



