. On the anatomy of vertebrates [electronic resource] . Inmost Ruminants (Oxen, Antelopes, Goats, Sheep) a pair of pro-cesses extend from the frontal bones, the dermo-perioste of whichdevelops a sheath composed of horny fibres: but the supportingprocess is long and conical, and the horn which sheaths it is corre-spondingly hollow, whence the Ruminants, so armed, are termedi hollow-horned. The bone is termed the i core : it has usuallya ruffous or grooved exterior: in Bovidce and Ovidce the frontal o ~ 1 The nasals of the fossil Rhinoceros minutus, Cuv., show a transverse pair of smalland smoot
. On the anatomy of vertebrates [electronic resource] . Inmost Ruminants (Oxen, Antelopes, Goats, Sheep) a pair of pro-cesses extend from the frontal bones, the dermo-perioste of whichdevelops a sheath composed of horny fibres: but the supportingprocess is long and conical, and the horn which sheaths it is corre-spondingly hollow, whence the Ruminants, so armed, are termedi hollow-horned. The bone is termed the i core : it has usuallya ruffous or grooved exterior: in Bovidce and Ovidce the frontal o ~ 1 The nasals of the fossil Rhinoceros minutus, Cuv., show a transverse pair of smalland smooth conical processes, which cannot confidently be inferred to have sustainedhorns: like the Rhinoceros incisivus, I believe it to have been hornless. 2 There are reports, needing confirmation, of a small third horn, as a rare variety. .HORNS OE MAMMALIA. 625 sinuses extend therein: in Antilopidce the core is solid or butslightly excavated at the base. In an Indian species (Antilopequadricornis, fig. 491) two pairs of horn-cores are developed from 490. iSkull of Ox with hom-core, a, and horn, b. 491 the frontals; the same peculiarity characterised the giganticextinct Antelopes (Bramatherium and Sivatherium, vol. ii. p. 473,fig. 322), and they also combined the branched character of the horn in the hinder pair, which isat present restricted to the singlepair borne by the Prong-horn An-telope (Antilocapra Americana, ). 492
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