Chap. V] 



THE SKELETON 



53 



BONES OF THE CRANIUM 



Occipital 1 



Parietal 2 



Frontal 1 



Temporal 2 



Ethmoid 1 



Sphenoid 1 



Occipital bone. — It is situated at the back and base of the 

 skull. At birth the bone consists of four parts, which do not 



vertex 



Sinciput 



Occiput 



Fig. 22. — Side View of the Skull. (Morrow.) 



Attention of the student is called to the text, page 64, where the word Mandible 

 is used in preference to the term Inferior Maxillary which is found on the illustra- 

 tion. The word Maxilla is also used in preference to Superior Maxillary. 



unite into a single bone until the sixth year. The internal sur- 

 face is deeply concave, and presents many eminences and depres- 

 sions for the reception of parts of the brain. There is a large 

 hole — the foramen magnum — in the inferior portion of the 

 bone, for the transmission of the medulla oblongata (the con- 

 stricted portion of the brain) where it narrows down to join the 

 spinal cord. At the sides of the foramen magnum it presents 



