He JULIA WORTHINGTON. 
to the skin, turns sharply dorsad, and then caudad, supply- 
ing the skin immediately over the fore part of the brain. 
N. Acustici c and d.—The acusticus ganglion les 
inside the cranium and the dura, close to the cephalic half of 
the lateral surface of the medulla. Most of the fibres from it 
enter the medulla along the dorso-lateral angle, but small 
clusters enter the lateral surface farther ventrad. The 
ganglion is pear-shaped, with its broader end cephalad, and 
is placed immediately caudad of the fibres of acusticus a. 
The acustic nerve consists of two branches, r. utricularis, 
acusticus c, and r. saccularis, acusticus d, entirely 
separate and distinct, and leaving the ganglion at different 
places. R. utricularis is the more cephalad of the two; it 
leaves the ganglion a little in front of its hind end, curves 
ventro-laterad, and enters the ear at its cephalo-ventral 
angle. R. saccularis forms the caudal continuation of the 
ganglion, running caudad between the glosso-pharyngeus 
and the cranial wall, its fibres passing mediad of the endo- 
lymphatic duct. At the hind end of the brain capsule, just 
cephalad of the foramen of glosso-pharyngeus and 
vagus, r. saccularis curves ventro-laterad, passing through 
the membrane into the ear capsule at its caudo-ventral angle. 
N. Glosso-pharyngeus.—(Miiller’s and M. Fiirbringer’s 
r. glosso-pharyngeus X.) The glosso-pharyngeus 
leaves the medulla along the caudal half of its lateral face. 
It has from four to seven roots of origin lying one behind 
the other between the acusticus ganglion and the exit of the 
vagus, and contains both sensory and motor fibres. Its 
fibres run caudad between acusticus d and the vagus, 
lying so close to the latter that it 1s difficult to distinguish 
one from the other. ‘The joint foramen of the glosso- 
pharyngeus and vagus lies at the caudal end of the 
cranium, in the angle formed by the junction of the ear 
capsule and the cranium, and the glosso-pharyngeal fibres 
pass out dorsal, anterior, and lateral to those of the vagus. 
The two nerves pass so close together, though, that I cannot 
say whether or not a few fibres of each stray into the trunk 
