158 MAMMALIAN DENTITION 



FIG. 56.— ANOMALIES OF THE HITMAN DENTITION. 



A. Left upper deciduous lateral incisor and canine develop- 



mentally fused (from east by Dr. M. J. Cramer). 

 The corresponding teeth of the right side were nor- 

 mally formed. 



B. Secondary elongation of third lower molar from develop- 



mental increase in size of the talonid and deficiency 

 in transverse growth (Colored skull 486, W.R.U.). 



C. Presence of fourth molar (European skull loaned by Mr. 



B. H. Broadbent.) This tooth which can be seen still 

 embedded in the jaw is of typical molar size and 

 form and occurs only on the left side of the mandible. 



D. Retained upper milk canine and second molar. Deficiency 



of metacone in second permanent molar (European 

 skull 317, W.E.U.). The permanent canine and second 

 premolar can be seen unerupted below the correspond- 

 ing deciduous teeth in this man of 35 years. There is 

 deficiency in growth of the alveolar process of the 

 jaw in the vicinity of these teeth. Absence of the 

 metacone is a not infrecpient condition in the second 

 maxillary molar. 



E. Stump-like left upper third molar (Colored skull 523, 



W.R.U.). 



F. Paramolar of the cusp type attached to left upper second 



molar (Colored skull '416, W.R.U.). 



G. Paramolar of the cusp tvpe attached to lower right third 



molar (Colored skull 388, W.R.U.). 



H. Carabelli's tubercle on right upper first molar (European 

 skull 392, W.R.U.). 



I. Extra cusp between metaconid and entoconid on right 

 lower first molar (European skull 471, W.R.U.). 



J. Retained right lower second deciduous molar (Colored 

 skull 441, W.R.U.). Note how all the molars are 

 coated with tartar on this side. The left teeth are 

 clean. There is no sign of a second premolar. 



