552 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



downward, but the grade of the obliquit}" differs. The cause of this 

 slope is, to a large extent, the great development of the alveolar 

 process, itself due in turn to the size of the teeth. Properly speak- 

 ing, we have here a high degree of mandibular prognathism. The 

 horizontal rami pass l)ackward with a moderate divergence, but the 



-SKI'LL of female ORAN(i SHOWINT; NASAI. SPINE (Cat. No. 112U'i9 T'.S.X.M.l- 



tWO rows of teeth, to connect with those of the upper jaw, run nearl}' 

 or entirely in parallel lines. This gives to each of the horizontal 

 bi'anches a rather pronounced twist, well seen from above, and adds 

 much to tlie thickness of the upper border l>ehind the second molars. 



