252 H. W. 
Ip., division of n.olf. from posterior 
rootlets 
Ijo., branch of n.olf. innervating Jacob- 
son’s organ 
Tra., anterior rootlets of n. olf. 
Irp., posterior rootlets of n. olf. 
TT., nervus opticus 
IIped., hollow optic stalk 
IIT., nervus oculomotorius 
IV., nervus trochlearis 
IVdcs., decussation of the trochlear 
nerve 
V., nervus trigeminus 
V ad VII., trigeminal fibers entering 
lateral line trunks of the facial nerve 
Vm., radix motor trigemini 
Vrm., radix mesencephalica trigemini 
Vrml., internal lateral portion of radix 
mes. V going to posterior part of 
tectum opticum 
Vrmp., posteriorly directed rootlet 
given off from the radix mes. V 
Vrr., radices trigemini 
Vsp., radix spinalis trigemini 
VI., nervus abducens 
VITI., nervus facialis 
VII ad X., lateral line anastomosis be- 
tween the facial and vagus nerves 
Vilc., radix communis facialis 
VIJgc., radix spinalis facialis = general 
cutaneous root 
VIIIl., radices lineae lateralis facialis 
VIIm., radices motores facialis 
VilIm.1, r. motor primus facialis 
VilIm.2, r. motor secundus facialis 
VIIm.3, r. motor tertius facialis 
VITrlld., radix dorsalis lineae lateralis 
facialis 
VIlrllv., radix ventralis lineae lateralis 
facialis 
VIIT., nervus acusticus 
NORRIS 
Villa., radix anterior acustici 
VIIIp., radix posterior acustici 
VIIIs., posterior saccular division of 
the auditory nerve 
VIIIv. vestibular division of the audi- 
tory nerve 
IX., nervus glossopharyngeus = n. 
branchialis primus 
IXph., r. pharyngeus IX 
IXprt., r. pretrematicus IX 
IX pst., r. posttrematicus TX 
IXr., radix glossopharyngeus 
X., nervus vagus 
X.1, nervus branchialis secundus 
X.1,ph., r. pharyngeus of second bran- 
chial nerve 
X.1,prt. r. pretrematicus of second 
branchial nerve 
X.1,pst, vr. posttrematicus of second 
branchial nerve 
X.2, nervus branchialis tertius 
X.2,ph., r. pharyngeus of third bran- 
chial nerve 
X.2,prt., rv. pretrematicus 
branchial nerve 
X.2,pst., vr. posttrematicus of third 
branchial nerve 
X.3,prt., Yr. pretrematicus of fourth 
branchial nerve 
X.4,prt., r. pretrematicus of fifth bran- 
’ chial nerve 
X.ad VII, r. communicans vagi cum 
facial 
of third 
X. ad IX, communis fibers passing from 
vagus roots into ninth nerve along 
with radix spt. 
Xr.2, radix secundus vagi 
Xr.3, radix tertius vagi 
Xrll., radix lineae lateralis vagi 
Xrspt., radix supratemporalis vagi 
Figures 1 and 42 to 44 are projections upon the sagittal plane of plottings 
from drawings made with the camera lucida. 
tions with a camera lucida or a projection lantern. 
Blood vessels are omitted. 
schematic. 
Figures 2 to 41 are drawn from sec- 
Only the minuter details are 
After the descriptions of most of the 
cross-sections is given the number of the section in figure 44 which corresponds 
approximately (or exactly) to the section described. 
