THE HEAD. 



49 



hor.-je is glandered, there will probably be a coiisideraole ulcera- 

 lioii HI the upper part of the cavity of" the nose, and a colleciion 

 of matter there. This is ascertained by making an opening into 

 the sinuses, which may be done with perfect safety. [See 

 Glanders.] 



Section of the Head. 

 Fig. 3. 



%5f 



~}0t 



a The nasal bone, or bone of the nose. 



b The frontal bone. The cavities or cells beneath art; called the frontal sinuses 



c The crest or ridge of the parietal bones. 



d The tentorium or bony separation between the cerebrum and cerebellum. 



e The occipital bone. 



/ The ligament of the XiQ.Qk.,ox pack-rcax, by which the head is ch'efly supported 



^ The atlas, svafaitdns^ or carrying : the first bone of the neck. 



k The dentata, tooth-like, or second bone of the neck. 



« The cuneiform, or wedge-shaped process, or base of the occipital bone. Be- 

 tween it and the other portion of the occipital bone, e, lies the great 

 foramen or apertui-e through which the prolongation of the brain — 

 the spinal marrow — issues from the skull. 



k The sphenoid, icedge-like, bone, v^'ith its cavities. 



/ The ethmoid, sieve like, bone, with its cells. 



m The cerebrum, or brain, with the appearance of its cortical and medullary 

 substance. 



11 The cerebellum, or little brain, with its beautiful arborescent appearance, 



o A portion of the central medullary, marroir-like^ substance of the brain, and 

 the prolongation of it under the name of the crus cerebri, leg of tht 

 brain, and from which many of the nerves take their origin. 



V The medulla oblongata — the prolongation of the brain after the medullary 

 substance of the cerebrum and cerebellum have united, and forming 

 the commencement of the soiual man-ow. The columnar appearance 

 4 C 



