SKELETON 7 



teriorly with the zygomatic process of the tem- 

 poral bones. 



9. The Maxillary Bones, which form the princi- 

 pal part of the upper jaw. Each bears the fol- 

 lowing teeth : one canine, three premolars, and 

 one molar. It has a posteriorly-directed process 

 which articulates with the malar bone, and is 

 called the malar process. It is pierced by the in- 

 fraorbital foramen. 



10. The Premaxillary Bones, which are tjdo small/V 

 bones meeting in the mid-line in front of the max- 

 illary bones. Each bears three incisor teeth. 



1 1. The Nasal Bones, which lie in the mid-dorsal 

 line above the nasal cavity. 



1 2. The Lachrymal Bones, which lie on the ante- 

 rior walls of the orbits. 



13. The Palatine Bones, which form the posterior 

 part of the roof of the mouth. The perpendicular 

 part of each is pierced by the spheno-palatine for- 

 amen. 



14. The Vomer, which forms the lower part of 

 the median partition between the nostrils. 



15. The Ethmoid Bone, which lies between the 

 frontal bones in the nasal chamber. It is com- 

 posed in part of many folded lamellae. 



16. The Mandible, or skeleton of the lower jaw, 

 which consists of two rami meeting anteriorly in 

 the symphysis. The posterior vertical portion of 

 the mandible is known as the ascending ramus, 



