22 MORPHOLOGY OF THE MEDULLA OBLONGATA. 



I am convinced, however, that in the rabbit the medulla 

 oblongata obtains its form in a different manner than in the 

 human subject. 



In Figure 15 one sees a few scattered ectodermic cells 

 on the border of the medullary wall and Randschleier. 



His has demonstrated the great power of migration 

 which these cells possess, and I am inclined to believe that 

 it is simply to this migration, and consequent accumulation? 

 that in the rabbit the tractus solitarius owes its burial, and 

 not to the development of any distinct rhomboidal lip. 



A probable lateral root (V), passing in the figure from 

 the mantel layer to the ganglion, should also be noticed. 



Finally, I would acknowledge the deep obligation I am 

 under to Prof. C. S. Minot, of Harvard University, and here 

 offer him my most sincere thanks, not only for his kindness 

 in lending me plates of the first six drawings (which were 

 taken from his book), but also for many valuable suggestions 

 which he made as regards the best method of pursuing this 

 investigation, and in giving me his opinion on all the dubious 

 points of diagnosis. , 



