174 PROCEEDINGS OF THE ACADEMY OF [1896. 



The divisions of the temporal ridge ioto two parts, the fronto- 

 temporal and the parieto-temporal and an interruption between the 

 two is one of the best characters by which sex can be distinguished ; 

 the same is true of the conversion of the asterionic portion of the 

 lambdoidal suture from a serrated to a harmonic tyj^e. 



The value of the marginal process of the malar bone in distin- 

 guishing sex is conceded. The mortise in the squamoso-parietal 

 suture and the division of the condyloid process into two facets are 

 of secondary value. 



The degree of concealment of the third molar has been over- 

 looked, considering the significance that this relation possesses in 

 studies of the horizontal ramus. It is evident that the degree of con- 

 cealment of the third molar is in direct ratio to the reduction of size 

 of the dentigerous portion of the bone and (all things being equal) 

 is an evidence of the departure from the primitive type. The phylo- 

 genetic value of the so-called lemurine process of Albrecht needs to 

 be defined. I have noted this process in the gibbon. The position 

 of the mental foramen with respect to the sockets of the premolars 

 and the first molar teeth is a character in osteology not to be gain- 

 said. In view of the results of Topinard in studying the region of 

 the mental symphysis in primitive man it is necessary to describe 

 accurately all structural variation at this place, hence peculiarities 

 in the shapes of the genial spine and the genial crest are given. 



