THE HEAD. 



43 



horse is glandered, there will probably be a consideranle ulcera- 

 tion m tho upper part of the cavity of the nose, and a collection 

 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. 

 Kg. 8. 



a The nasal bone, or bone of the nose. 



6 The frontal bone. The cavities or cells beneath are called the frontal sinases. 



e The crest or ridge of the parietal bones. 



d The tentoriam or bony separation between the cerebmm and cerebellam. 



e The occipital bone. 



f The lig^ament of the nec^ or pack-wax, by w^hicb the head iscb'sfiy supported, 



CThe atlaSf stistainiTi^ or carrying: the first bone of the neck. 

 The dentata, toothrHke, or second oo£ie of the neck. 



% The cnneiform, 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 

 foransen or apertare throngh which the prolongation of the brain — 

 the spinal marrow — ^issues from the skull. 



k The sphenoid, wedge-likej bone, w^itk its cavities. 



I The ethmoid, steve-liJce, bone, with its cells. 



m The cerebram, or brain, with the appearance of its cortical and medoUai^ 

 Bubst&nce. 



n The cerebellum, or little brain, with its beautiful arborescent appearance. 



o A portion of the central medullary, marroio-liJce, sabstance of the Brain, and 

 the prolongation of it under tlie name of the cms cerebri, leg of the 

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



p The znedoUa oblongata — the prolongation of the brain after the medallary 

 snbfitance of the cerebrum and cerebellum have united, and forming 

 the commencement of the soinal marrow. Th& columnar appearance 



