6 4 



J. FRANK PEARCY AND THEODORE KOPPANYI. 



The vision of the fish with dislocated eyes was tested during the 

 period of the last three weeks of the experiment and found to be 

 very good. If a small rod was slowly moved toward the eye the 

 animal quickly turned aside and avoided it constantly. 1 The 

 animal showed in all respects the behavior of a fish in possession 

 of its visual function it avoided all kinds of obstacles. The fishes 

 did not show the phenomenon which Parker described concerning 

 blind fish, i.e., they remain usually near the bottom and swim 

 about in such a way as to be almost continually in contact with 

 some solid surface, as though relying on its sense of touch for 

 its location. 



FIG. i. Goldfish, with the dislocated eye. The other eye removed. 



i.When the'animal was near the surface it avoided the rod before it reached the 

 water. 



