104 



Herbert Eugene Walter 



the light, as well as the opposite side— its wanderings were in the 

 main on the side away from the light. An hour's activity is chron- 

 icled in the record, at the close of which the worm was apparently 

 as energetic as ever. 



Fig. 14 Planaria gonocephala. The path is of the same generic type as with Planaria maculata 

 (Fig. 13), and is easily distinguishable from those of Dendrocoelum, Phagocata and Bdelloura. 



Fig. 12 gives a characteristic record of the way in which Bdel- 

 loura behaves. The first movement of this specimen was more 



