In Cainotherium and Dichobune the upper incisors are fully developed.

The interstitial types have small irregular upper teeth, with turned, stumpy or missing lateral incisors.

The size of the central incisors seems to be directly proportional to the degree of pituitary predominance.

The pituitary types have teeth that are large and square and irregular, with prominence of the middle incisors, and a marked separation or crowding of them.

The Tragulidoe; have no incisors in the upper jaw, and only six grinding-teeth on each side of each jaw; while the canine is moved up to the outer incisor, and there is a diastema in the lower jaw.

Up to five years, the age of a sheep can always be determined by the incisor teeth; a yearling has but two permanent incisors, a two-year-old four, a three-year-old six, and a four-year-old or over eight teeth, or a full set.

The interstitial types have small irregular upper teeth, with turned, stumpy or missing lateral incisors.

The left lower lateral incisor had a very small gold filling, which you can see as a nearly circular white dot.