400 F. L. LANDACRE 



EXPLANATION OF FIGURES 



34 is taken through the anterior end of the dorso-lateral lateralis VII ganglion 

 and the root of the Gasserian. 



35 is taken through the trunk (hyomandibular nerve) of the ventral lateralis 

 ganglion of the VII and the root of the geniculate ganglion. 



36 is taken through the root of the ventral lateralis ganglion. 



37 is taken through the extreme anterior tip of the auditory ganglion. The 

 dorsal lateralis VII runs through figs. 34 to 37. 



38 and 39 are taken through the anterior and median portions of the auditory 

 ganglion. The roots of the dorso-lateral, ventro-lateral and geniculate ganglia 

 appear in figs. 37, 38 and 39. 



40 to 43 (A. neb., Stage VII) are taken from the same embryo as figs. 25 to 30. 

 Figs. 40 and 41 are consecutive sections and show the only recognizable trace of a 

 condensation of the cells derived from the lateral mass in the region of the IX 

 nerve, except the ventral portion of the lateral mass (Y) which does not enter into 

 the IX ganglion. 



40 is taken one section posterior to the auditory vesicle. 



41 is taken two sections posterior to the auditory vesicle. 



