Fig. 86. N. insulatus,
“Upper molar 1”—
natural size,
after Ameghino.

Nesohippus Ameghino

Nesohippus Amegh., 1904, Anal. Soc. Cienc. Argen., t. 56, p. 34 of reprint.
Nesohippus Amegh., 1904, Anal. Mus. Nac. B. A., ser. 3, t. 3, p. 218.

This genus is described as very like the foregoing, but differs in having a strong perpendicular style on the anterior external face of the upper molars. As in the preceding genus, the crown is considerably expanded above the roots. I feel that this genus will also prove to be the milk teeth of some one of the genera of this family. One species is described, based on a single tooth.

N. insulatus Amegh., 1904, loc. cit. under the genus.

The species is just as described under the genus, the last upper molar measuring 24 mm. long by 16 mm. wide; given as from the upper Deseado.

CHAPTER IX
Isotemnidae

This family is distinguished by the formula