THE FACE. 145 



lary. Between these two parts is a notch, forming the outer 

 extremity of the spheno-maxillary slit. 



The angles of this bone are called processes. The upper one, 

 which is continuous with the external angle of the os frontis, is 

 the superior orbitar, or angular process. The orbitar margin 

 terminates below, in the inferior orbitar, or angular process. 

 That portion of the bone which joins with the zygoma of the tem- 

 poral, is the zygomatic process; and the fourth angle is the max- 

 illary process. 



The os malae articulates with four bones ; to wit, with the 

 maxillary, frontal, sphenoidal, and temporal. 



There are some few small foramina in this bone, which trans- 

 mit nerves and blood vessels. 



6. Inferior Spongy Bones, (Ossa Spongiosa ant Ttirbinata Infe- 

 rior a, Cornets Inferieurs.) 



This pair of bones is situated at the inferior lateral parts of 

 the nose, just below the opening into the antrurn Highmorianum. 

 They are very thin and porous, and their substance is extreme- 

 ly light and spongy. 



The internal face of the spongy bone is towards the septum 

 of the nose, and presents an oblong rough convexity. The ex- 

 ternal face has a corresponding concavity towards the maxillary 

 bone. The superior margin presents, in front, an upright pro- 

 cess, which joins with the anterior inferior angle of the ungui- 

 form bone, to form the nasal duct. Just behind this, the margin 

 of the bone is turned over towards the antrum, forming a broad 

 hook, which rests upon the lower margin of the orifice of the 

 antrum, and diminishes its size. From the superior margin, also, 

 one or two processes not unfrequently arise, whereby this bone 

 joins the ethmoid. The inferior margin is somewhat thicker 

 than the superior. 



The anterior extremity of this bone rests upon the ridge 

 across the root of the nasal process of the upper maxillary. The 

 posterior extremity rests, in like manner, upon the ridge across 

 the nasal plate of the palate bone.* 



* In some rare cases this bone adheres to the ethmoid, so as to become a part 

 of it. 



VOL. I. 13 



