EXPLANATION OF PLATE IV. 



Fig. 6. 

 A transverse section of the femoral arteiy of a dog, 8 days after 

 ligature. High power. See pp. 37-38. (First Series.) 



Fig. 7. 

 Vascularized tissue obliterating the lumen of a femoral artery of 

 a dog, 21 days after ligature. Injected. Low power. See p. 40. 

 (First Series.) 



(64) 



