1034 



trace willi a great ainoiinl of exactness tlie course of the motor 

 roots and Ihe position of tlieir nuclei, wliicli, hronglir in relation \c, 

 the sensory systems of this animal, provided new contributions to 

 the doctrine of nenrobiotaxis. 



^ 



f 



M 



_.•• 



S) 



In Fig. 1 

 and one of a 

 reproductions 



I give two reconstructions, one of a Selachian (ScjUium) 

 Teleost (Tinea), and in Fig. 2 I give the topographical 

 of the three Ganoïds as yet examined. 



