22 



LEON J. COLE 



No simple explanation appears to offer itself as to why the 

 converse of the above should be true, namely that a specimen 

 which had been crawling c-w^ard should, when placed on^its 



Fig. 8 Diagrams of starfish righting itself. Arrow indicates direction of 

 turning; note that all tube feet are extended in that direction. Arms attached 

 to substratum are indicated by X. 



aboral surface, use more often the rays opposite (e and a) in 

 righting itself. This is a point deserving further study. 



At best the results in this connection seein rather paradoxical. 

 Jennings found that his starfishes used ray e more often than 



