( 1058 ) 
lar cell-massing of the vagus region of the oblongata continues 
unnoticed in that of the octavus region. 
In fig. 14 there is visible under the Radix spinalis nervi V a 
tiny group of small cells (/), whieh form the frontal pole of a 
circumscribed group of small and medium-sized cells, the meaning 
of which I cannot conceive. 
The cell clusters in the caudal part of the oblongata of Ciconia, 
which in position agree with the olivae inferiores of mammals, and 
in the lateral part of which polygonal cells are found connected 
with the reticular elements, are no longer present in fig. 1d, 
For the further description of the birds [ refer to CaJar’s excel- 
lent work. The basal position of a large part of the reticular 
elements on the VII and V level is particularly striking in his 
drawings. I found it so in Ciconia also, and will merely mention 
still that the nc. parvocellul. sup. raphes also oecurs in Ciconia. 
Mammals. 
In the mammals which | examined I found the large reticular 
cells in the oblongata arranged in a way which principally is the 
same in all of them. I only found gradual differences and some 
differences in the relationship of details. 
The smaller reticular cells form groups of greater or less size 
which generally cannot be sharply defined, though where [ succeeded 
in doing so, | received the impression as if the groups of smaller 
reticular cells also agree in principle with each other in the mam- 
mals. In how far the differences which occur are connected with 
other differences in the formation of the oblongata, I have not 
been able to decide; to bring out all those details [ should have to 
give a complete series of drawings of each animal, which would 
lead me too far. L shall therefore content myself with describing two 
animals in which the peculiarities of the large reticular cells were 
the clearest, viz. the giant kangaroo (Macropus robustus), the caudal 
part of which I shall describe, and the horse, of which I shall 
illustrate the frontal part on account of the peculiarities being the most 
pronounced there. 
The large reticular cells are found in Macropus and in the horse 
specially massed in two places: one cluster lies in the vagus and 
octavus region and attains its greatest development at the candal 
boundary of the VIIL root-entrance, the other lies on the level of the 
motor V nucleus. 
Fig. 15 shows a section passing through a caudal level of the 
