Robert Armitage Sterndale,
Natural History of the Mammalia of India and Ceylon
“ Horned Ruminants and Hornless Ruminants, such as the chevrotians or deerlets (Tragulidæ) . DIVISION Horned Ruminants, containing two groups, viz. Hollow-horned Ruminants (Bovidæ) , and Solid-horned Ruminants (Cervidæ) . The deerlets possess no psalterium or third stomach, except in a rudimentary form, and their feet approximate to those of the pigs, and they are destitute of horns. The hollow-horned ruminants are those which bear a persistent sheath of horn on a bony core; the others bear solid antlers which are periodically shed, and grow afresh. ”
