THE SUTURES. 



5T 



malar to the occipital bone, bounded by the frontal and parietal bones 

 above, and the malar, sphenoid, and temporal bones below. 



The fro7iio-parietal, or coronal suture, connects the frontal and the 

 two parietal bones. It commences at each side, about an inch behind 

 the external orbital process of the frontal bone, above the great wing 

 of the sphenoid, and mounts upwards and backwards to the vertex. 

 It presents the most marked dentations in the middle of each lateral 

 half ; at the summit the serrated surface is oblique, the frontal bone 

 overlapping the parietal, while similarly at the lower part the parietal 

 overlaps the frontal. 



The occi])ito-pariefal, or lamlidoidal suture, between the occipital and 

 parietal bone, inclines downwards and outwards on each side and. has 

 somewhat of the form of the Greek letter a. The occijjito-mastoid 

 suture is in continuation with it. 



Fiff. 50. 



Fig. 50. — Lateral View of the Skull represented in Figure 49. (A. T. ) | 



1, frontal bone ; 2, parietal bone at tlie temporal ridge ; x x , coronal suture ; 3, on 

 tlie occipital bone at the lower end of the lambdoidal suture, near its meeting with the 

 occipito-mastoid and parieto-mastoid sutures ; .3', external or posterior occipital protuber- 

 ance ; 4, great wing of the sphenoid bone ; 5, squamous part of the temporal bone ; 6, 

 the same at the root of the zygoma, immediately over the meatus auditorius externus ; 

 7, mastoid portion of the temporal bone, in front of which is the mastoid process ; 8, the 

 left condyle of the occipital bone ; 9, the anterior opening of the nares ; 10, on the lachry- 

 mal bone in the inner wall of the orbit ; 11, malar bone, near its junction with the 

 zygoma ; 12, superior maxillary bone behind the canine fossa ; 13, ramus of the lower 

 jaw ; 14, body of the lower jaw, near the mental foramen. 



