cavicorn

A vast series of living and of fossil animals, called the Ruminants—including the giraffes, the antler-bearing forms called deer, the cavicorn or sheath-horned bovines, ovines and caprines, and the large series of antelopes of Africa and India—all have precisely this form of jaw, this number and shape and grouping of the teeth.

In this extraordinary animal there were two pairs of horns, supported by bony "horn-cores," so that there can be no hesitation in referring Sivatherium to the Cavicorn Ruminants.