emydinidæ

from The Century Dictionary.

• A family of soft-shelled tortoises, typified by the genus Emydina, including a few Asiatic species referred usually to the Trionychidæ, having the edge of the disk strengthened by a series of internal bones, the skull oblong, convex, and swollen, and the palate with a central groove. Also Emydinadæ.