Prohegetotherium sculptum Ameghino
P. sculptum Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 424.
This species is characterized by the deep external furrow on the upper molars. The measure given is 34 mm. for the length of the three upper molars.
Prohegetotherium shumwayi sp. nov.
Founded on a portion of the right maxilla, carrying pm. 2 to 4 and m. 1, found on the Chico del Chubut, west of Puerto Visser, by Waldo Shumway.
Fig. 29. H. Shumwayi—
natural size.
The teeth are simple, with but a shallow external furrow near the anterior margin of the premolars and molar. A film of cement covers each tooth and extends to the top of the crown. The form is smaller than P. sculptum.
| Measurements | ||
|---|---|---|
| Upper premolar 3, | length 6 mm., | width 3¼ mm. |
| Upper premolar 4, | length 7 mm., | width 3½ mm. |
| Upper molar 1, | length 7 mm., | width 3½ mm. |