53 



THE CAT. 



[CHAP, in. 



termed the zygoma (Z). At the hinder end of the zygoma is a trans- 

 versely extended, smooth concavity called the glenoid surface (g). 

 The under surface of the face (formed by the bones of the roof of 



Fig. 29. UNDER SURFACE OF SKULL 

 The two openings enclosed by the pre-maxillse and maxillae are the anterior palatine foramina. 



6. Auditory bulla. 

 bo. Basi-occipital. 

 bs. Basi-sphenoid. 

 c. Canine. 



fm. Foramen magnum. 

 tj. Glenoid surface. 

 i. Incisors. 

 j. Malar. 

 m. Maxilla. 

 mo. Molar. 

 ms. Mastoid process, 

 oc. Occipital condyle. 



pp. Palatine (placed one above, the other be- 

 neath the opening of the posterior nares). 



pf. Post-orbital process of frontal. 



pj. Post-orbital process of malar. 



pm. Pre-maxilla. 



pmo. Pre-molars. 



pp. Par-occipital process. 



ps. Pre-sphenoid. 



pt. Pterygoid process. 



>. Supra-occipital. 



Z. Posterior root of zygoma. 



3. Palatine foramen. 



8. Sphenoidal fissure and foramen rotundus. 



{>. Foramen ovale. 



10. Eustachian opening. 



11. Foramen lacerum posterius. 



the mouth) lies at a slightly different level from that of the base of 

 the cranium. The two low, elongated bony plates (pt) just spoken 

 of connect these two surfaces together on each side, but in the 

 middle line, leave a vacuity between them, which is the hinder 

 opening of the nostrils, or posterior nares (shown, in Fig. 29, by the 



