Figure ii8. Cross-sections through 

 the eves of a Bottlenose Whale 

 {dotted) and a man {black), to 

 show differences in the shape of the 



eye and lens and in the thickness of the 



sclera. {Putter, igos.) 



Figure iig. Course of light rays and their 

 focal point in the eyes of a man and a 

 Beluga, in the air and in water. Man 

 becomes long-sighted in water, a whale 

 short-sighted in air. 



