BONES OF THE FACE 



187 



lower part of the face, and carry the upper incisor teeth. They are joined 

 together in front, and also by a thin flexible plate which forms the 

 anterior part of the roof of the mouth and the floor of the nostrils. In 

 the old animal they become inseparably bound together by ossific union. 



Lachrymal Bone. This is a small bone situated at the inner angle 

 of the orbit, which it assists in forming. It has running through it a 

 funnel-shaped cavity (Lachrymal fossa), which gives lodgment to a small 



Fig. 289. Skull (Side View) 



Nasal Peak. ' Nasal Bone. - Inferior Orbital Foramen. 3 Lachrymal Bone. 4 Oftrital Cavity. 5 Frontal Bone. 

 * Temporal Fossa. 7 Zygomatie Arch. 8 Parietal Bone. 9 Supra-oondyloid Process. 10 Occipital Tuberosity. 

 11 Petrous Temporal Bone. " External Auditory Hiatus. 1S Maxillary Condyle. " Styloid Process of Occipital 

 Bone. 10 Occipital Condyle. 16 Styloid Process of Petrous Temporal Bone. 17 Temporo-maxillary Articulation. 

 18 Squamous Temporal Bone. 19 Malar Bone. * Superior Maxilla. 21 Mental Foramen. M Anterior Maxilla. 



sac (lachrymal sac), and this is continuous with a long membranous canal 

 (lachrymal diict), which conveys the tears from the eye into the nostrils. 



Malar Bone. --This is placed at the outer and inferior part of the 

 orbit, where it sends a branch backward and joins the temporal bone to 

 form the zygomatic arch, and the socket for the lodgment of the eye 

 and its muscles. 



Palatine Bones. The palatine bones are situated at the back part 

 of the roof of the mouth, and form a narrow border to the posterior nares 

 or opening between the nostrils and the throat. 



