438 



CRANIA FROM THE MOUNDS OF FLORIDA. 



tinctly accented in the middle and a wide interval is denned between the cusps. 

 Compare fig. 78 first tooth, 79 first tooth, 73 second tooth and 97. More distinct 

 mammillations so arranged as to make a tricuspidate form are also noted. Compare 



fig. 98 second tooth and 93 second tooth. 



...... 



©3 

 j 



\(?S 



K 



i 



'i 



m 



Fig. 27.— Thirteen examples of lower premolars : a. No. 73 : b. No. 97 ; c. No. 126 ; d, No. 430 ; e, No. 1060 ; 

 /, No. 98 ; g, No. 118 ; h. No. 70 ; i, No. 78 ; j, No. 79 ; fc, No. 80 ; I, No. 76 ; m, No. 93. 



The commissures are feebly developed in all forms of lower premolars. Raised 

 anterior and posterior borders such as are met in many forms (compare figs. 98, 

 126) are not here alluded to. But in a smaller group of teeth these borders are 

 worthy of receiving a distinct name, e. g., fig. 70 second premolar, and fig. 76 first 

 premolar. 



The enumeration of the parts of the crowns of the lower premolars as cusps 

 and commissures appears to receive confirmation when these teeth are compared 

 with those of the lower mammals, especially with the genera of the anthropoid apes 



