1 8 FLORENCE PEEBLES. 



of the leg and wing buds fully confirm those of Lillie and Shorey. 

 In no case was the slightest sign of regeneration observed. 



SUMMARY. 



1. It is possible for chick embryos to develop in porcelain cups 

 in a moist chamber at the proper temperature, up to the ninth 

 day, although the development is delayed. 



2. The leg bud when removed may be grafted on the proximal 

 part of the wing and the wing bud may be grafted on the proximal 

 portion of the leg without permanently injuring the embryo. 



3. The results indicate that when the tip of a young bud is 

 grafted on the proximal portion of another limb it becomes a 

 part of the appendage to which it is attached instead of retaining 

 the character of the part it is destined to become. 



4. No regeneration of the limbs takes place after the removal 

 of the buds. 



BRYN MAWR COLLEGE, 

 BRYN MAWR, PA., 



November 12, 1910. 



LITERATURE. 

 Lillie, F. R. 



'04 Experimental Studies on the Development of the Fowl (Callus domeslicus). 

 Biological Bulletin, Vol. VII.. No. i. 



Peebles, F. 



'98 Some Experiments on the Primitive Streak of the Chick. Archiv fur 

 Entwickelungsmechanik der Organismen, Vol. VII. 



Shorey, M. L. 



'07 The Effect of the Destruction of Peripheral Areas on the Differentiation 

 of the Neuroblasts. Journal of Experimental Zoology, Vol. VII., No. i. 



