THE HEAD. 



81 



a strong piece more or less deeply channeled, according to the animals, and 

 provided at its inferior extremity with rugosities for the attachment of the anterior 

 straight muscles of the head ; on the sides, the lacerated foramina — large irregular 



Fig. 49. 



horse's head (anterior face). 

 1, Occipital tuberosity ; 2, origin 

 of the mastoid crest ; 3, parietal 

 bone; 4, saggital suture ; 5, junc- 

 tion of the parietal and temporal 

 bones ; 6, zygomatic arch ; 7, 

 frontal bone ; 8, frontal suture ; 

 9, temporal fossa ; 10, supra-orbital 

 foramen ; 11, 12, lachrymal bone ; 

 13, malar bone ; 14, nasal border of 

 frontal bone ; 15, nasal bone ; 16, 

 suture of nasal bones; 17, super- 

 maxillary bone ; 18, infra-orbital 

 foramen; 19, anterior, or pre- 

 maxillary bone ; 20, foramen in- 

 cisivum ; 21, incisor teeth (young 

 mouth). 



horse's head (posterior face). 

 , Occipital tuberosity ; 2, foramen magnum ; 3, 

 3, occipital condyles; 4, 4, styloid processes; 

 5, 5, petrous bone ; 6, basilar process ; 7, ptery- 

 goid fissure of the sphenoid bone ; 8, foramen 

 lacerum ; 9, 9, supra-condyloid, or anterior mas- 

 toid process; 10, lo, articular eminence, or 

 temporal condyle; 11, body of sphenoid bone; 

 12, pterygoid process; 13, ethmoid bone; 14, 

 temporal bone and sphenoidal suture; 15, 

 lachrymal bone; 16, vomer; 17, malar Ijone ; 

 18, maxillary tuberosity; 19, posterior, or 

 guttural opening of the nose ; 20, palate bone ; 

 21, palatine styloid process; 22, palato-maxil- 

 lary foramen ; 23, palatine process of superior 

 maxillary bone, with suture ; 24, ditto of pre- 

 maxillary bone; 25, premaxillary bone; 26, 

 upper incisor teeth ; 27, point of junction of 

 the premaxillary with the superior maxillary 

 bone ; 28, upper molar teeth (young mouth). 



openings divided, in the fresh state, into two portions {anterior and posterior 

 lacerated foramina). To the outside of these openings is the base of the tuberous 

 portion of the temporal bones, especially the tympanic bulb ov petrous bone ; above 



