488 LAND MAMMALS IN THE WESTERN HEMISPHERE 



and still smaller was ^Carolozittellia of the Casa Mayor, which 

 was not so large as a tapir. In the latter the molars were of the 

 same type as in the succeeding forms and small tusks had al- 

 ready begun to develop. The older Eocene genus ^Paulo- 

 gervaisia was probably a member of this suborder; if so, it 

 shows that the molars with transverse crests were derived from 

 quadritubercular teeth, just as happened in the Proboscidea 

 and several other ungulate groups. 



