AND PHYSIOLOGY. 



49 



smallest bones in the Face, being about fth of an inch in 

 diameter. Thej are situated at the inner angle of the eye, 

 and are named from the Latin Lachryma 1 a u tear." since 

 the tears pass into the nostrils through a canal in these 

 bones. This bone is also called Os Unguis. 



Fig. 56. 



Fig. 55. 



An Anterior View of the Os Un- 

 guis of the Left Side. 1, Its An- 

 terior Inferior Angle. 2, Orbitar 

 Plate and Side for the Os Pla- 

 num. 3, Fossa for the Lachry- 

 mal Sac. 4, Superior Extremity. 



A Posterior and Half Lateral Yiew of the Pal- 

 ate Bone, 1, Palate Plate on its Nasal Surface. 

 2, Nasal Plate. 3, Pterygoid Process. 4, Sur- 

 face for Articulating with its fellow. 5, Half 

 of the Crescentic Edge and Spine for the Azygos 

 Uvulae Muscle. 6, Ridge for the Inferior Spongy 

 Bone. 7, Spheno-Palatine Foramen. 8, Orbital 

 Plate. 9, Pterygoid Apophysis. 10, Depression for the External Pterygoid 

 Process of the Sphenoid Bone. 11, Same for the Internal Pterygoid Process. 



114. Palate Bones. — The Palate Bones are the most ir- 

 regular bones of the face, and when viewed in one direction 

 resemble the capital letter L. They form a part of the orbit 

 of the eye, the wall of the Fig. 57. 



nose, and a large part of the 

 roof of the mouth which is 

 known as the hard palate. 



115. Turbinal Bones. — 

 The Turbinal Bones (really 

 the Inferior Turbiriated 

 Bones, since corresponding 

 plates upon the ethmoid bone 

 are called Superior Turbinated 



An External View of the Inferior 

 Spongy Bone of the Right Side. 1, An- 

 terior Extremity, for resting on the 

 Ridge of the Upper Maxilla. 2, Posterior 

 for resting on the Ridge of the Palate 

 Bone. 3, Hooked portion, for resting on 

 the Lower Margin of the Antrum High- 

 morianum. 4, Its Inferior Border. 



113. What are the smallest bones of the face, and why called Lachrymal ? 114. What 

 are the most irregularly-shnped bones in the face, and what portion of the mouih is 

 made up by the Palate Bones? 115. Give the description of the Turbinal Bones. 



