_ Perforated by . mg i! of small holes, throu 
_ form the inner sides of the orbits ie Sees. externally, and 
2 Plate, and perpendicular plates, are also Sieve partition, nose 
3 BOTANIC PHYSICIAN. 
The wedge-shaped bone is connected with all the bones of the 
skull by harmony; it is also united to the two cheek bones, the two 
upper jaw bones, and the palate-bones, by agreement ; and to the 
plough-share, by being, as it were, nailed to it. It forms the base of 
the skull, helps to form the orbits, the pituitary canal of the nose, 
the temples, &c., and it contains the middle lebes of the brain. 
TEMPLE BONES. 
‘These are placed at the sides and lower part of the skull ; in shape, 
they are irregular, and they are divided into a spurious portion, which 
forms the spinous suture, and a stony portion, which is very irregu- 
lar, and is situated at the base of the skull. 
Its processes are, the yoki process, which, with a process of the 
cheek bone, forms the yoke or arch of the temples, under which the 
temple-muscle moves, and which gives rise to several n Wuscles of the 
face, as the chewing and joining muscle; the breast-like process, 
which projects from under each ear, in the front part of which the 
muscle to move the head forwards is inserted, and into its back part, 
the muscles which move the head obliquely backwards; the pencil- 
& mpies 
shaped process, which is long and narrow, gives origin to a ligament 
of the bone of the tongue, also to muscles of the tongue and throat ; 
___ the sheath-like process, which surrounds the root of the pencil-pro- 
cess ;,and the hearing process, or outer bony circle of the hearing 
passage, to which the membranes of the brain and the cartilage of 
the ear are affixed. 
“~The gauities are, the external hearing canal, which leads to the 
internal hearing canal, which begins on the 
back part of the internal surface of the stony portions, and transmits 
the seventh pair of nerves: it has immediately within it the internal 
opening of the aqueduct of Fallopius. a 
Each temple bone is joi 
7 
ned to the side bones by the spurious su- 
ture; with the wedge-shaped, and the cheek bones by harmony ; 
_ and with the lower jaw by 
3 : of the jaw. The use of th 
_ the brain, and. the organ of hearing ; and to concur in 
its excrescences fitting in the depressions 
ese bones is to contain the middle lobes of 
forming the 
the temples and base of the skuil. ae | 
©" Shy SIEVE-SHAPED Bone. 
ae situated in the fore part of the ae of the skull abov 
— te ; e the root 
of the nose, and between the orbits. Its shape is that of a cube, or 
Its processes are, a sieve-like pl i 
ae © SIE plate which 
the root of the nose, within the cavity of the skull, It isevery where 
soi gh which the smelling _ 
at € nose. The cock’s crest, a process which pro- _ 
eae Ss, : re serie the sieve-bone, and. has. at : 
tached 3 me oe ytne process 8) t e€ oute . ee 
Two flat circular b ones, which are * mombrane of thebesi37” 
considerable processes, de- 7 
