54 



BONES OF THE HEAD. 



occipital bone, bounded by the frontal and parietal bones above, and the 

 malar, sphenoid, and temporal bones below. 



Fig. 49. 



Fig. 49. LATERAL OR PROFILE VIEW OF THE SAME SKULL AS THAT REPRESENTED IN 



THE PRECEDING FlGURE. ^ 



Placed so that a horizontal line passes through the anterior nasal spine and meatus 

 auditorius externus. 1, frontal bone ; 2, parietal bone figures 1 and 2 are placed above 

 the temporal ridge of these bones ; x x , coronal suture ; 3, occipital bone the figure 

 is placed at the lower end of the lambdoidal suture, and at its meeting with the addi- 

 tamentum suturse squamosse and additamentum suturge lambdoidalis ; 3', external or 

 posterior occipital protuberance ; 4, great wing of the sphenoid bone, between the frontal, 

 anterior inferior angle of the parietal and squamous part of the temporal bones ; 5, the 

 summit of the squamous part of the temporal bone ; 6, at the lower part of the same and 

 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 the figure is close 

 to the mastoid foramen ; 8, the left condyloid process of the occipital bone ; 9, the 

 anterior opening of the nares or nasal notch; 10, the inner wall of the orbit, on the 

 lachrymal bone; 11, the malar bone, close to its junction with the zygoma ; 12, superior 

 maxillary bone the figure is placed on the body behind the canine fossa ; 13, ramus of 

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



The fronto-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 occipito-parietal, or lambdoidal suture, situated between the occipital 



