CRANIAL SYMPATHETIC GANGLIA IN THE RAT 



175 



development of sympathetic ganglia. Kuntz ('09) traced the 

 origin of the ganglion cells of the esophageal, gastric, intestinal, 

 pulmonary, and cardiac plexuses to cells which migrated outward 

 from the hindbrain and from the vagus ganglionic masses periph- 

 erally along the vagus trunk. From Kuntz' figures, however, 

 I must confess some doubt as to the complete accuracy of his 

 observations. With special techniques and a large series of 



G.symp, 



Fig. 1 Rat embryo, 16 days, Carnoy's 6-3-1. Neuroblasts among fibers of 

 the inferior caroticotympanic nerve. Projection drawing, X 500. 



ABBREVIATIONS 



A.C.N. IX., accompanying cells, neive 



IX 

 B. bronchus 

 C.P., coeliac plexus 

 C.S.S., ganglion cells of cerebro-spinal 



type 

 C.T., chorda tympani 

 E., esophagus 

 G.VII, ganglion geniculi 

 G.C., ganglia cardiaca 

 G.N. V., ganglion Gasseri 

 G.N .X., ganglion, nerve X 

 G.O., ganglion oticum 

 G.p.t., ganglion of plexus tympanicus 

 G.S., sympathetic ganglion cells 

 G.symp., ganglion sympathicum 

 G.S.N. IX. ganglion sympathicum, 



nerve IX 

 G.S.N.X, ganglion sympathicum, 



nerve X 



G.sph., ganglion sphenopalatinum 



G.T.E., tracheo-esophageal ganglion 



Gang, ling., lingual ganglia 



/., intestine 



M., ramus mandibularis V 



N.IX, glossopharyngeal nerve 



N.C.I., nerve cells of the intestinal 



coat 

 N.C.R.O., nerve cells of the ramus 



ophthalmicus V 

 N.C.N.T., nerve cells of the nervus 



terminalis 

 N.R., nervus recurrens 

 N.T., nervus terminalis 

 O., optic cup 

 Ph., pharynx 



R.P.VII, ramus palatinus VII 

 R.P.I X, ramus palatinus IX 

 TV., trachea 



