CHAPTER XXm. 



AUATOMT AND DISEASES OF THE SHEEP^S HEAD, 

 CONTINUED. 



SECTION OP sheep's HEAD GKUB JN THE HEAD HYDATID 



ON THE BRAIN WATEE ON THE BKAIN APOPLEXY 



INFLAMMATION OF THE BRAIN TETANUS OR LOCKED JAW 



EPILEPSY PALSY RABIES. 



SECTION OF sheep's HEAD. 



1. The nasal bone. 



2. The upper jaw bone. 



3. The intermaxillary bone, the fore part 



of which supports the pad, against 

 which the incisor teeth shut. . 



4. 4. The frontal sinuses, or cavities. ' 



5. The sinus of the horn, communicating 



with frontal sinus, disclosed by re- 

 moving a section of the base and 

 bone of the horn. 



6. The parietal bone. 



7. The frontal bone. 



8. A vertical section of the brain. 



9. A vertical section of the cerebellum. 

 a. The cineritious portion.of the brain, 

 ft. The medullary portion of the brain. 



10. The ethmoid bone, with its cells. 



11. The cribriform or perforated plate of 



the ethmoid hone, pierced with 

 numerous holes for the passage of 

 the olfactory nerve. 

 13. The development of the lower cell of 

 ethmoid bone. 



13. The superior turbinated bone. 



14. The inferior turbinated bone. 

 17. The sphenoid bone. 



Grub in the Head. — In the months of July and August 

 sheep are often seen gathered in dense clumps with their 

 heads turned inward and their noses held down to the 

 ground. If driven away, they run without raising their 

 heads, or rapidly thrust them down again, as if they had 

 some yery urgent motive for retaining them in that position. 

 12* 



