THE BONES OF THE HEAD 127 



that suture is absent, with the parieto-squamosal suture. Anteriorly 

 it is continuous with the fronto-malar suture. 



There are tvvo other spheno-frontal sutures. One connects the rough 

 triangular surface on the antero-superior part of the great -wing of the sphenoid 

 bone with the rough triangular surface on the frontzd bone behind the external 

 angular process. This is a harmonic suture. The other spheno-frontal 

 suture (orbito-spheno-frontal suture) will be described under the orbital 

 suturts. It also appears, however, in the anterior fossa of the internal sur- 

 face of the base of the skull. 



The spheno-squamosal suture connects the external border of the 

 great wing of the sphenoid bone with the antero-inferior border of 

 the squamous part of the temporal bone, its direction being down- 

 wards and backwards as far as the inner end of the fissure of Glaser. 

 Its upper part forms a squamous suture, but its lower part is serrated. 



The zygomatico-malar suture connects the extremity of the zygo- 

 matic process of the temporal bone with the posterior or zygomatic 

 process of the malar bone. It Ues obHquely, being directed down- 

 wards and backwards, and it is finely serrated. 



The fronto-malar suture will be described imder the orbital sutures. 



The fronto-maxillary suture, which is serrated, connects the 

 lateral part of the nasal notch of the frontal bone with the superior 

 border of the nasal process of the superior maxilla. It lies almost 

 transversely. 



The fronto-nasal suture connects the mesial part of the nasal 

 notch of the frontal bone with the superior border of the nasal 

 bone. It lies transversely, and is serrated. Across the median 

 Hne it is continuous with its fellow of the opposite side, and lateredly 

 it is continuous with the fronto-maxillary suture. The point corre- 

 sponding to the meeting of the two fronto-nasal sutures coincides 

 with the nasal point or nasion. 



The internasal suture connects the mesial borders of the nasal 

 bones. Its direction is vertical, and it is a harmonic suture. The 

 lower end of the suture coincides with the rhinlon. 



The naso-maxillary suture connects the external border of the 

 nasal bone \vith the anterior border of the nasal process of the 

 superior maxilla. Its direction is almost vertical, and it is finely 

 serrated. 



The malo-maxillary suture connects the rough triangular area at 

 the anterior part of the internal surface of the malar bone with the 

 rough superior surface of the malar process of the superior maxilla. 

 The opposed surfaces are rough, and a false suture is formed of 

 the harmonic variety. The orbito-malo-maxillary suture will be 

 described under the orbital sutures. 



The intermaxillary suture is only partially seen on the facial 

 surface of the skull. This part extends from the centre of the 

 anterior nasal spine to the point of meeting of the alveolar margins 

 of the superior maxillae. The palatal part of the suture connects 

 the mesial borders of the palatal plates of the superior maxillae. 

 Its direction is antero-posterior, and it is a harmonic suture. 



