SYMPATHETIC SYSTEM IN MAMMALS 255 



10. The fact that the sympathetic system is homologous 

 with the other functional divisions of the nervous system lends a 

 new aspect to the problems involving its functional relations. 

 The fact that the vagal sympathetic plexuses have their origin in 

 the hind-brain and the vagus ganglia will, doubtless, have an 

 important bearing on certain physiological and psychological 

 problems involving the heart action and the digestive functions. 



Accepted by the VVistar Institute of Anatomy and Biology, April 21, 1910. Printed July 8, 1910. 



