64 



A MANUAL OF AN ATOM V 



Pacchionian bodies. Close to the postero-inferior angle there is a 

 short groove for part of the lateral venous sinus. 



Borders. — The posterior, anterior, and superior borders are 

 serrated. The posterior border articulates with the occipital ; the 

 superior, with its fellow ; and the anterior with the frontal. The 

 anterior border is bevelled below at the expense of the inner plate, 

 where it overlaps the frontal, and it is slightly bevelled above at the 

 expense of the outer plate, where it is overlapped by the frontal. 

 The inferior border, which is the shortest, is for the most part 

 concave and markedly bevelled at the expense of the outer plate, 



Superior Border and 

 Groove for Superior Longitudinal Sinus 



Pacchionian Depressions 



Parietal Foramen 



Anterior... 

 Border 



Antero-inferior Angle 

 Anterior Meningeal Groove 



Posterior Meningeal Groove 

 at Inferior Border 



Postero-inferior Angle 

 Groove for Lateral Sinus 



Fig. 43. — The Right Parietal Bone (Internal View). 



where it is overlapped by the squamous portion of the temporal. 

 Posteriorly, however, it is serrated for the superior border of the 

 mastoid portion of the temporal. 



Angles. — The antero-superior angle, with its fellow, lies in the 

 situation of the original anterior fontanelle. The postero-superior 

 angle, with its fellow, occupies the region of the original posterior 

 fontanelle. The postero-inferior angle is truncated, and articulates 

 with the mastoid portion of the temporal, being also recognised 

 by the short groove for the lateral venous sinus on its inner 

 aspect. The antero-inferior angle is prolonged and pointed, 

 and articulates with the great wing of the sphenoid, bein^ also 



