THE SKULL AS A WHOLE 



135 



for the attachment of the lateral cartilages of the nose, and in the middle line 

 below a prominent process, the anterior nasal spine, bounded by two deep notches. 

 Below this is the intermaxillary suture (sutura iiitermaxillaris), and on each side 

 of it the incisive fossa. Beneath this fossa are the alveolar processes of the maxilla 

 and mandible, containing the incisor teeth, and at the lower part of the median 

 line the symphysis of the chin, the mental process, with its two mental tubercles, 

 separated by a median groove, and the incisive fossa of the mandible. 



On each side, proceeding from above downward, is the supraorbital ridge, 

 terminating externally in the external angular process at its junction with the malar, 

 and internally in the internal angular process; toward the inner third of this ridge 

 is the supraorbital notch or foramen, for the passage of the supraorbital vessels 



FIG. 101. Anterior aspect of the skull. 



and nerve. Beneath the supraorbital ridge is the opening of the orbit, bounded 

 externally by the orbital ridge of the malar bone; below, by the orbital ridge 

 formed by the malar and maxilla; internally, by the nasal process of the maxilla 

 and the internal angular process of the frontal bone. On the outer side of the 

 orbit is the quadrilateral outer surface of the malar bone, perforated by one or 

 two small malar foramina. Below the inferior margin of the orbit is the infra- 

 orbital foramen, the termination of the infraorbital canal, and beneath this the 

 canine fossa, which gives attachment to the Levator anguli oris; still lower are the 

 alveolar processes, containing the teeth of the upper and lower jaws. Beneath the 

 alveolar arch of the mandible is the mental foramen, for the passage of the mental 



