,^^1 P 140*7 



iXy^^^\- / A ^ ' \ WITH COMPLIMENTS GF" 



JUN 26 1926 H- E.WALTER 



BHOWNUNjVERSiTY, 



It 1, Oili PROVIDENCE, R.I 



' ' 69.11.856:51.23 



CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY OF THE 



MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD 



COLLEGE. E. L. MARK, Director. 



No. 193. 



THE REACTIONS OF PLANARIANS TO Ll'GHT. 



By Herbert Eugene Walter. 



From the Journal op Experimental Zoology, Vol. V., Nos. 1, 2. 



CAMBRIDGE, MASS., U.S.A. 

 December, 1907. 



