356 PRACTICAL ANATOMY. 



over on the lingual surface, generally dividing the lingual 

 cusp into two. 



The roots of both lower bicuspids are oval in shape. 

 The first superior molar has a large crown, and is in out- 

 line like a rounded rhomboidal; the buccal and lingual 

 surfaces are convex and the approximal flattened. It 

 has four cusps, on the masticating surface of which the 

 mesio-lingual is the largest, the mesio-buccal next in size, 



fara-merv 

 of Ste 



of Scttrpn 



\ Aet.j>a'lcttin Ganatr 

 \ 



Accessory palattni 



FIG. 155. THE UPPER PERMANENT TEETH IN POSITION. 



then the disto-buccal, and, smallest of all, the disto- 

 lingual. The mesio-lingual cusp is connected with the 

 disto-buccal by a ridge, and around each other cusp is 

 a fissure, one running mesio-bucally and the other 

 disto-lingually. This fissure often runs over on the lin- 

 gual surface. It has three roots, one lingual and two 

 buccal, the lingual being largest and round ; the buccal 

 roots are flat, and the anterior larger than the posterior. 

 The second superior molar resembles the first, but 



