1123 
In the calamus the dorsal motor vagus nucleus has grown thicker: 
it then contains about 70 cells of the mixed type, the larger of 
which lie for tbe most part ventro-laterally. Frontally from the 
calamus the dorso-medial portion broadens out so that the nucleus 
becomes triangular in form with the base of the triangle turned 
towards the ependyma (fig. 4). In the frontal third part of the 
nucleus 170 cells can be counted in many of the sections, frequently 
we see the large-celled type in groups together in the ventro-lateral 
(the figure is reversed ; it represents the left side) 
Fig. 4. a = aberrant bundles, b = bloodvessels. Fig. 5. b = bloodvessels. 
portion. As usually the nueleus decreases here first in its dors6- 
medial portion, a thin column, which creeps up the ependyma, is 
preserved longest and, as the ventral portion is well developed 
there, the nucleus in this region shows the form of a pyramid, 
with the apex pointing upwards. (fig. 5). 
The dorsal motor vagus nucleus of the camel does not reach to 
the level of the facialis nucleus, as is the case in several other 
mammals. 
At the spinal extremity of the dorsal motor vagus nucleus in the 
camel, the nucleus accessorius is still clearly visible rather more ventral 
and’ decidedly lateral, in the substantia reticularis. It can even be 
seen on a level near the caudal extremity of the nucleus XII. (fig.6). 
Here the accessorins nucleus is very unequally developed, fre- 
quently but few cells are found; but we may see a more or less 
round group of the familiar large cells, at the most 20—24, very 
74 
Proceedings Royal Acad. Amsterdam. Vol. XVII. 
