2 ANATOMY. | 9 
seending directly under the cock’s crest into the cavity of the nose, 
and forming, with the plough-share, the nose partition. Two hollow 
substances, which are curled like a piece of parchment, one on 
each side of the partition, called the upper spongy bones. There 
are a number of small holes on each side of the cock’s crest; two 
circular holes of the nose, one situated between the forehead bone 
and the circular plate of the sieve bone, for the passage of the nasal 
branch ef the orbital nerve; a number of cells which compose the 
internal parts of the bone, and form the pituitary canals of the sieve 
bone. os 
This bone is connected with the forehead bone, and the nose bones, 
the two upper jaw bones, the two palate, the wedge-shaped, and the = 
plough-share bones, by harmony. Its use is to form an extensive =~ 
surface for the organ of smell, to constitute part.of the nose, orbits, 
and skull. a 
OF THE FACE. 
The bones of the face are fourteen in number, and are divided 
into those of the upper and lower jaw. 
The upper jaw is formed of thirteen bones, viz. two upper jaw, 
two nose, two palate, two cheek, two lower spongy, and two tear 
bones, and the plough-share, or separating bone of the nose, which 
are all united to the skull and to one another, by harmony. The 
lower jaw is one bone. 
There is an obvious line beginning at the external angle of the 
orbit, where the forehead bone is joined to the cheek bone, which ~ 
Teads to the inferior opening of the orbit, proceeds upwards to the 
nose, whose root it crosses, and then traverses the other orbit to the : 
external angle: this is the transverse suture. The other harmonies 
of the face are called after the bones they unite. ae 
— UPPER JAW BONES. 
These bones are situated in the front and middle part of the face. 
Their shape is irregular. eee 
The processes are, the nose process, which forms the sides ofthe — 
nose ; the orbitar process, or plate, which forms part of the orbit; the _ 
process in which the teeth are placed; the palate process, which 
forms the palate ; and a spine, formed by the junction of the palate 
bones, on which the plough-share rests. fe 
Its cavities are, the jaw cave, and the jaw pituitary canal, inthe 
body of the bone, between the orbital and palate processes; itopens 
into the nostrils. The lower orbital canal, which opens under the 
margin of the orbit, and transmits the orbital nerve. The tear de- 
pressions, situated in the upper internal pa : nose process, 
for the reception of the tear-bag ; it leads to the nasal canal which 
_ conveys the tears into the nostrils; The back palate-hole, near t 
_ back tooth, on the inside, for the ge of 
_ Botch in the front part of the palate process, w. 
