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caudal extremity is not easily determined, efferent hypoglossus roots 
can be observed very far caudad and it is frequently seen that, 
frontally from sections in which XII cells are present, ventral horn 
cells again appear; a sharp boundary between ventral horn and 
hypoglossus nucleus is not present (fig. 6). Also, it can be seen in 
several of the sections that cells have shifted from the vagus column 
ventrally to near the hypoglossus region (fig. 7), a position which 
strongly resembles that in birds. The first constant XII cells appear 
dorsally, close to the dorsal motor vagus nucleus, then the medial 
group of XII cells appears and finally its ventro-lateral group. 
Spinally from the calamus, the three groups of XII cells are not 
clearly defined and one or two groups of it are rather poorly 
developed. Frontally from the calamus the grouping is clearer and 
also central cells occur. The- dorso-lateral group is most strongly 
represented and is the most constant, the other groups are in several 
sections less strongly developed. Frontally the dorso-lateral group 
disappears first, and the ventral remains longest. 
The hypoglossus column extends 134 sections frontal from the calamus. — 
The vliva inferior of the camel is poorly developed. It appears 
with a ventral lamella, rather ventro-lateral. on the transverse 
level of the spinal pole of the nucleus XII. This ventral lamella 
spreads medially and then creeps up the raphe. The second lamella 
lying dorsally and representing the olivary nucleus sense strictiori 
does not appear before in the neighbourhood of the calamus. At the 
frontal pole of nucleus XII, it becomes thicker; it ends rather 
frontally from the ambiguus swelling (fig. 6). Its cell type is small, 
the cells being thinly sown in some places. 
The exceedingly poor development of the nucleus reticularis inferior 
is striking. Very few cells occur in the raphe, most of them front- 
ally in the ventral portion, 
In the series of this camel, through the whole vagus region, at 
the left side, an aberrating descending bundle is seen. In the acoustic 
region we see cross-sections of a few small sharply outlined bundles, 
under the lateral ependyma, of the IV ventricle. At the right side 
we find at that place one little bundle. Caudally the bundles on the 
left side increase greatly in number and their diameter varies greatly. 
At the frontal pole of nucleus X dorsalis the bundles are crowded into a 
wedgeshape between the cells of this nucleus: fig. 4 (This figure is rever- 
sed, it represents the left side). An ascending bundle of fibres, beneath the 
ependyma runs in a dorsal direction along the top of the vagus nucleus; 
more caudally a ventral branch also appears, which runs medially from 
