The first was largely ineffective, the second has produced all the eutherian orders of to-day.
The dentition is the complete eutherian dentition of forty-four teeth.
The number of teeth is 42—nearly the typical eutherian number.
The early eutherian stock consisted of small mammals with small heads and slender, long tails.
According to his showing, therefore, the preponderance of marsupial features are eutherian.
Teeth often exceed the typical eutherian number of forty-four; molars generally four on each side of each jaw.