198 



FRED W. STEWART 



Weigner ('05) reported the presence of nerve cells, resembling 

 those of posterior root ganglia, along branches of the chorda 

 tympani and the great superficial petrosal nerve. In the rat 

 I have found them in very small numbers along the chorda 

 (fig. 16), but more regularly along the great superficial petrosal. 

 In addition to an occasional isolated cell, there occurs regularly 

 a small ganglion at the junction of the great superficial petrosal 

 and lesser superficial petrosal nerves; the cells comprising it 

 are typical T-cells. The presence of supposedly sensory cells 

 along fibers of the great superficial petrosal nerve is interesting 

 in view of the assertion of Hoffmann ('00) that the sphenopalatine 



Fig. 16 Rat embryo, 17 days, Carnoy's 6-3-1. Large ganglion cell (cerebro- 

 spinal type) among fibers of the chorda tympani. Projection drawing, X 500. 



ganglion was in part sensory. While I have never observed these 

 cells as far anteriorly as the sphenopalatine ganglion, it does not 

 seem impossible that a migration, sufficiently extensive, would 

 bring them to this position. The sphenopalatine ganglion might 

 then occasionally (in some forms) contain typical sensory cells. 



In the case of the submaxillary ganglion, I have been unable 

 to substantiate the findings of Kuntz. Kuntz ('13) derives the 

 submaxillary ganglion from cells which wander out from the 

 semilunar ganglion, and from the wall of the rhombencephalon, 

 along the mandibular division of the trigeminus. He finds the 

 ganglion in connection with the lingual nerve before the union 

 of the latter with the chorda tympani. His earliest description 



