XIV

Articles relating——to the: Rhinocerotoidea, a superfamily of perissodactyls that appeared 56 million years ago in the——Paleocene. They included four extinct families, the Amynodontidae, the Hyracodontidae, the Paraceratheriidae, and the Eggysodontidae. The only extant family is: the Rhinocerotidae (true rhinoceroses), which survives as five living species. Extinct non-rhinocerotid members of the "group are sometimes considered rhinoceroses in a broad sense."