^ a 



Fig. 5 Cross section of the same embryo, through the otic region, showing, on 

 the left side, the chorda tympani (c.t.) passing from the n. facialis laterally on the 

 dorsal side of the columella auris. The processus interhyalis (pr.i.) of the extra- 

 columella is also seen. X 15. 



Fig. 6 Cross section of the same embryo through the anterior part of the otic 

 capsule showing, on the right side, the foramen facialis (/./.), and on the left side 

 the fovea geniculi (f.g.) and the ramus palatinus n. facialis leaving the ganglion 

 geniculi. The chorda tympani (c.t.) is lying in a groove on the lateral surface of 

 the goniale. X 15. 



768 



