MEDULLA OBLONGATA OF THE RABBIT. 



13 



and jugular vein are seen as 

 more complicated. 



schleier outward. These probably correspond to the lateral 

 root of this ganglion. 



Figure 9 is a drawing of a transverse section of the 

 (VII and VIII) ganglia. 



The pharynx, carotid, 

 before, but the gangJia are 



The two divisions of 

 the VIII ganglion, the 

 vestibular and cochlea, are 

 separated from each other. 

 Inferior to the latter a 

 small piece of the cochlea 

 appears in section. Be- 

 tween these two ganglia 

 the motor root of the VII 

 appears, whose fibres can be 

 seen arising from the ven- 

 tral zone of the medidla, 

 crossing the Randschleier, 

 and then becoming indis- 

 tinct in their relation to the 

 geniculate ganglion. 



In this preparation, no 

 fibres could be traced from 

 the cochlear ganglion to 

 the medullary wall. The 

 vestibular ganglion is of an 

 irregular pear-shape, and 

 fibres can be seen extend- 

 ing from it across the Randschleier and into the medullary 

 wall. These fibres correspond to those already described in 



Section of the medulla of an embryo 

 rabbit 10.8 mm. at right angles to the floor 

 of the fourth ventricle in the region of the 

 (VII, VIII) ganglia. TS, tractus solitarius. 

 F, ganglion restibuli. 6?, ganglion genic- 

 uli. Co, ganglion cochleae. jugular 

 A ein. C, carotid. OjT, otic vesicle. 



