ALFRED SCHAPER. 



Hence, my observations upon the development of the amphibian 

 lens (especially under abnormal conditions) having assured me 

 of a close resemblance of this process to the differentiation of a 

 primitive sense organ, I have advocated this fact as a new evi- 

 dence, in addition to many others, of the originally sensory nature 

 of the crystalline lens. 



