58 



THE CAT. 



[chap. III. 



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

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

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



Pig. 20.— Under Surface of Skull 

 The two openings onclosecl liy tlic ]ire-inaxillic and maxilla: are the anterior palatine foramina. 



t. Amlitorj' bulla. 

 ho. ]5!iKi-occi]iitiil. 

 hs. Basi-splienoiil. 

 c. Canino. 



fm. Koranicn nKiKiinin. 

 (/. Olcnnul surliai-. 

 i. Incisors. 

 j. Malar. 

 7/1. Maxillii. 

 1(10. Millar. 

 Ills. Mastoid procps.s. 

 fw. Oi'(i)iital coiidyk'. 



J3J). l'alaliii(!(iilaciMl one aliovc, tlic (itlicr lic- 

 ueath the ojieuiiig ol the iiostorior nari's). 



})/. Post-orliital jirocrss of frontal. 



///'. l'ost-orl)ital jirocess of malar. 



■pin. Prc'-maxilla. 



jmio. Pro-molars. 



pp. Par-occi]iital process. 



ps. Pre-siilionoid. 



pt. Pterygoid prooess. 



fo. Su]ira-occipital. 



/. Posterior root of zygoma. 



:i. Palatine foramen. 



s. Siilienoidal lissure and foramen mtundns 



!'. l'oian\en ovale. 



111. Ku.staeliian opening. 



11. Foramen laecioini jiosterins. 



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 jwsfcrior iKircs (.shown, in Fig. 29, by the 



