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LECTURE X. 



at once in tlie extraordinary development of the frontal sinuses, 

 by wliich tlie supraciliary ridges coalescing in the middle be- 

 come so prominent, tbat above, or ratber behind them, the 

 frontal bone presents a considerable depression, whilst a hollow 

 is also formed in the region of the root of the nose. The fore- 

 head is narrow and flat, but the middle and posterior portions 

 of the cranial arch are well developed. The semicircular line, 

 indicating the upper attachment of the temporal muscle, though 

 not strongly developed, ascends to more than half the height 

 of the parietal line. On the right orbital ridge, is observed an 

 oblique furrow indicative of some injury received daring life ; 

 upon the right parietal bone is a depression of the size of a 

 pea. The coronal and sagittal sutures are on the exterior 

 nearly, and on the inside of the skull entirely efiaced. The 

 lambdoidal is open ; the frontal is indicated externally by a 

 slight ridge, and where it joins the coronal, this ridge also be- 

 comes slightly protuberant. The sagittal sature is grooved, 

 and above the angle of the occipital bone ; the parietal bones 

 are depressed. 



rig. 97. Neander Skull, top view. 



