PEARSE. 



THE REACTIONS OF AMPHIBIANS TO LIGHT. 



175 



that this species is positively phototropic ; a condition which is not, 

 so far as I know, found in any other caudate amphibian. All the in- 

 dividuals used were of the orange type of coloration, and it is possible 

 that animals of this species having the green phase might give different 

 results. 



(/) Rana clamata. 



Although the eyes were not excised from any individual of this spe- 

 cies, the reactions observed are given in Table IV. for comparison with 



TABLE IV. 

 Photic Reactions of Rana clamata. 



the next form. They agree essentially with those described by Parker 

 (:03 b ) and Torelle (:03) for R. pipiens and R. viridescens. Five indi- 

 viduals were tested, and they all proved to be positively phototropic. 



(g) Rana sylvatica. 



This frog was more active than the last species, and some individuals 

 gave more decided phototropic reactions than did any member of the 



TABLE V. 



Photic Reactions of Rana sylvatica, with and without Eyes. 



