300 MORGAN. 



regeneration of internal organs, and these organs can rarely or 

 never be injured. If, then, such organs have the power of com- 

 plete regeneration, why need we seek for special explanations 

 for those cases in which the organs happen to be more or less 

 exposed to injury ? 



BRYN MAWR COLLEGE, BRYN MAWR, PENS., 

 January 1 5, 1898. 



