CRANIAL SYMPATHETIC GANGLIA IN THE RAT 



179 



the stomach and in still larger quantities (perhaps due to its 

 smaller diameter) in the developing intestinal coat (fig. 2). As 

 regards their origin, the possibility of the addition of elements 

 originating from the trunk sympathetic proper, and migrating 

 outward along the sympathetic branches accompanying the 

 divisions of the coeliac axis, or the superior mesenteric artery, 

 or along direct strands connecting the vagus with the coeliac 



C. P. 



Fig. 2 Rat embryo, 15| days. Neuroblasts of intestinal plexus. Projection 

 drawing from pyridine-silver preparation, X 500. 



plexus, must be considered. Study of fibers joining the enteric 

 nerve plexus with the coeliac convinces me that any addition 

 from the latter at this stage is small. Later stages have not 

 been examined in search of such additions since the scope of the 

 present paper included merely the demonstration of a ganglion 

 cell contribution of vagus origin. What is perhaps a slight 

 addition from the coeliac ganglionic mass is indicated in the figure 

 to which reference has just been made. In addition, there is 



