106 FISTULA AND POLL-EVIL 
axis, the occipital crest, the occipito-atlantoid 
articulation the atlanto-axoid ligament, the 
spinal cord, the funicular portion of the liga- 
mentum nuche, the musculature, the blood sup- 
ply, the anterior end of the spinal cord the 
meninges, the medulla oblongata, the spinal ac- 
cessory nerve, and the first two spinal nerves. 
The skin of the central line of the poll is 
thick and inseparable from the thick pad of the 
mane lying immediately beneath it. On the 
sides of the mane it is thin, somewhat delicate 
in texture, but possesses nothing out of the 
ordinary to describe. On the sides, the borders 
of the wing of the axis can be felt through it. 
Elsewhere the outlines of the bones can be 
palpated through it. In old cases of poll-evil 
it is riddled with perforations and often it con- 
tains scars of previous perforations. 
The pad of the mane at the poll is very 
heavy especially in the draft breeds of horses, 
often exceeding two inches in thickness. In the 
lighter breeds as for example the thorough- 
breds it is thin and in some subjects it does not 
exist. The pad here like that at the base of 
the neck is composed of elastic tissue and fat 
matted into a very firm structure homogeneous 
in appearance, and always very vascular. 
The atlas, or first cervical vertebra possesses 
