662 



quently, liowever, the two main groups are quite separated from each 

 other. Tlie medial group of the ventral tongue-nucleus has shifted 

 away from the raphe and simultaneously a small group of little 

 cells appear between the tongue nucleus and the raphe (nucleus 

 funiculi teretis) (fig. 19^/) ; the bridge of connection with the vagus 

 nucleus luxs vanished and in its place one or more small groups of 

 cells have appeared (nucleus intercaiatus Staderini) (fig. 19^). These 







dorsalis S^ 



XII ventralis •' 



Fig. 19. 

 lie thus laterally from tiie dorsal tongue nucleus, i. e. between the 

 latter and the dorsal motor vagus nucleus. Some cells of these 

 last groups are of a larger type than those of the group next the 

 raphe. The ventral tongue nucleus gradually diminishes ; the cell 

 type has grown smaller, the medial portion disappears first, the 

 lateral portion, lying under the ventral point of XII. dorsalis remains 

 longest in existence (fig. 20). The cell-group between the raphe has 

 grown larger ; it contains ± 30 cells, many of a larger type than 

 these which first appear ; soon similar cells also appear here in the 

 raphe, so that the two small cellular nuclei are connected medially 

 from the tongue nuclei by a group of cells. In this region too 

 we often see tiny cells and little cell-groups between tongue and 

 vagus nucleus. The distal nucleus soon completely disappears, but 



