Crania of Aboriginal Americans. 

 Ancient Pbeuvian, Fig. 4. 



m 



He gives the following description of this cranium : — 

 " Though the forehead retreats rapidly, there is but little 

 expansion at the sides ; and from the face to the occiput, in- 

 clusive, there is a narrowness that seems characteristic of the 

 race. The posterior view represents the skull elevated in that 

 region, without any unnatural width at the sides, and the ver- 

 tical view sufficiently confirms the latter fact. 



Measurements,* 



Longitudinal diameter. 

 Parietal do. 



7.3 inches. 

 5.3 ... 



* The measurements are thus described by Dr Morton. The longitudinal 

 diameter is taken from the most prominent part of the os frontis to the oc- 

 ciput ; the parietal diameter from the most distant points of the parietal 

 bones ; i\iQ frontal diameter from the anterior-inferior angles of the parie- 

 tal bones ; the vertical diameter from the fossa, between the condyles of 

 the occipital bone, to the top of the skull ; the inter-mastoid arch is mea- 

 sured with a graduated tape, from the point of one mastoid process to the 

 other, over tlie external tables of the skull ; the inter-mastoid line is the dis- 

 tance, in a sti-aight line, between the points of the mastoid processes; theom- 

 pito-frontal arch is measured by a tape over the surface of the cranium, from 



