The representative of the first premolar is minute and soon shod.
In the Hapalidae, as in the Cebidae, there is a third premolar, but the molars are reduced to 2/2.
There is but one incisor, but the premolar and molar series are complete.
It has lost only one premolar, and has therefore forty teeth in all.
The third premolar is lacking from each side of both the upper and the lower jaws of each individual of this series from Álamos.
Originally: A permanent first premolar (arrow) was discoverd in M-8.
As a rule but one tooth of the milk set is functional, which is (according to many) the fourth premolar.
The dental formula is known, and is complete save for the loss of one incisor above and below, and one premolar above.
The small size of the canine and of the first premolar produces a diastema in the tooth series.
The genus Choeropotamus has a complete dental formula save for the loss of a premolar in the lower jaw.