Leontinia garzoni Ameghino
L. garzoni, Amegh., 1896, Bol. Inst. Geog. Argen., t. 15, p. 650.
L. garzoni, Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 474.
We were not fortunate enough to find this species, but as described by Ameghino it is about 60 per cent. of the size of L. gaudryi. The type is a lower jaw, for which the following figures are given:
| Lower dentition, | length from pm. 1 to m. 3 | 120 mm. |
| Lower dentition, | length from pm. 1 to pm. 4 | 45 mm. |
| Lower dentition, | length of pm. 4 | 15 mm. |
| Lower dentition, | length of m. 3 | 39 mm. |
Ancylocoelus Ameghino
- Ancylocoelus Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. 652.
- Ancylocoelus Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 475.
- Rodiotherium Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. 653.
- Rodiotherium Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 476.
This genus differs from Leontinia in its formula,
- 3 0 4 3
- ———
- 3 0 3 3
but, except for the loss of these canines and the lower premolars, is very similar. In this it seems to approach the line which gave rise to Colopdon. The premolars and molars are also narrower in proportion than in Leontinia. I have placed Rodiotherium also under this genus as I can not see a generic difference in the descriptions. However we were not fortunate enough to find these forms. Ameghino has described four species as follows:
| A. frequens, 1895, Bol. Inst. Geog. Argen., t. 15, p. 475. | |
| Upper dentition, pm. 1 to m. 3 | 150 mm. |
| Lower dentition, pm. 2 to m. 3 | 150 mm. |
| Upper molar 3, length | 39 mm. |
| A. lentus, 1901, Bol. Acad. Nac. Cordoba, t. 16, p. 407. | |
| Upper molar 3, length | 48 mm. |
| A. minor, 1901, loc. cit. | |
| Upper molar 3 | 34 mm. |
| A. (Rodiotherium) armatum, see cit. above. | |