ITHYGRAMMODON, gen. nov.
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.
Ithygrammodon cameloides, sp. nov.