With respect to form and structure, attention has necessarily 

 been paid to the shape and sculpture of the several premolars and 

 to their periods of rise and fall in terms of the posterior molars : 

 to the shape, properties and accessory furniture of the true molars: 

 and to the form of the lower contour line of the mandible. 

 Occasionally it has been found useful to notice the shape and 

 direction of the lower incisor, the condition of the symphysis, the 

 level of the inlet of the dental canal, the position of the internal 

 orifice of the lachrymal canal, and status of the anteorbital 

 foramen. 



A jaw is accounted adolescent in which appears the first trace 

 of wear on the hind lobe of the penultimate molar; it is supposed 

 to be adnit when the same state of wear obtains in the last molar. 



When the posterior surface of an upper molar is excavated 

 vertically and the inner lip of the semifuniculate gorge resulting 

 is raised, this lip in the antecedent teeth appears as an adpressed 

 fold. 



The term link is retained for the "longitudinal ridge linking 

 together the several lobes, or the front lobes and their respective 

 talons; valley is a term convenient in use to indicate the hollows 

 which are constant between the lobes and frequent on the talons. 



The (][ualification elongate applied to molars implies that those 

 of the lower jaw are on the average one half longer than broad, 

 or thereabouts. 



