Group B.

B-1. Thirteen skulls referrable to Cormohipparion B, differ from the group A mostly by their longer naso-incisival notches. They tend also to have longer muzzles and shorter palates.

B-2. Two skulls are similar but quite smaller.

B-3. Five skulls have a long muzzle.

B-4. One skull (74400 from MacAdams) has a wide muzzle.

B-5. Three skulls, with very wide muzzles, belong in Group B.