Our fragments of this fossil show an animal about the size of the
llama, and approximating more closely to the _Tylopoda_ than to any
living forms.
The genus is established upon the two premaxillary bones, containing
the incisors, parts of the maxillaries, the canine and the first
premolar; besides fragmentary portions of the palatine plates. As
the peculiar features of these remains render them unique, we are
warranted in establishing the genus _Ithygrammodon_.
_Generic characteristics._
The premaxillaries are long, narrow, and very straight, bent slightly
in on their own axis as in _Camelidæ_, but expanded laterally at the
end of symphysis as in _Pecora_. The upward processes are sharply
defined, with a wide, rounded upper border.
The upper incisors are six in number, and _are placed nearly in a
straight line fore-and-aft_, separated from each other and from the
canine by small and subequal diastemas.
The _incisors_ are nearly equal in size, cylindrical in shape, are
placed vertically in their alveoli, and are slightly recurved.
The spine of the premaxillaries is long and thin, giving very long
anterior palatine foramina, as in _Ruminantia_. The premaxillaries,
in position, are close together, showing a very narrow muzzle.
The maxillaries have two well-developed canines, with long, laterally
compressed fangs, recurved and becoming circular in section at the
crowns. The diastema between the canine and the first premolar is
proportionate to that in _Procamelus_.