386 



A MANUAL OF DENTAL ANATOMY. 



have a further departure from the carnivorous character, 

 in the increased development of the molar series : the dental 

 formula is 



i* cl P 4 m!. 

 3 1 l 4 2 



In the Coatimundi, for example, the upper sectorial 

 Fio. 16S ] . 



has a very large ' tubercle,' and posteriorly to this there is 

 a small additional tubercle; the 'blade' has no large or 

 conspicuous thin, flat, sharp edge, but presents two pro- 

 nounced cusps. 



The lower sectorial is no longer recognisable as a car- 

 iiassial tooth, but all the true molars are broad teeth with 

 four or five cusps. 



The canines are very peculiar, those of the upper jaw 

 being very straight and much flattened from side to side ; 

 those of the lower jaw strongly curved, and marked by a 

 deep groove near the front of their anterior surface. 



(*) Upper and lower tooth of a Coatimundi (Nasua socialis). The fourth 

 upper premolar (carnassial tooth) has lost its sectorial character by the 

 Wade being much less, and the tubercle much more developed than in the 

 (Eluroidea ; there is an additional internal tubercle at the back of the 

 tooth. 



