File:Zöology; a textbook for colleges and universities (1920) (14757157726).jpg

Identifier: zologytextbook00cock (find matches)
Title: Zöology; a textbook for colleges and universities
Year: 1920 (1920s)
Authors: Cockerell, Theodore D. A. (Theodore Dru Alison), 1866-1948
Subjects: Zoology
Publisher: Yonkers-on-Hudson, N. Y., World book company
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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e, but it was relatively long-bodied andshort-legged, with a large head. Why it became extinct,we do not know. Certainly the climate was not unfa-vorable, as horses ran wild in vast numbers when laterintroduced by the Spaniards. Man could hardly havebeen responsible, for aboriginal man did not destroy thegame animals of this continent. Possibly some diseasedestroyed the horse in America, leaving no proof of itsexistence. 6. In the Old World the genus Equus (Latin, a horse) Old Worldpresents a number of very distinct types, including the horseshorses proper, the asses, and the zebras. The typicalor true horses formerly abounded in Europe and Asia,but today only one wild species exists. This animal,found in western Mongolia, was named Equus przewal-skii, after the well-known Russian explorer, Przewalski,who obtained the first specimen nearly 40 years ago.It is a pony with a relatively large head (here suggestingthe Equus scotti), a short, erect mane, and a tail with 422 ZOOLOGY Originof
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Photograph by E. R. Sanborn, N. Y. Zoiil. Soc.FIG. 197. Przewalski wild horse (Equus przcvalskii). rather short hair basally, though ending in a long tuft.The general color is dun, and there is a distinct stripedown the back, while shoulder stripes and barring on theupper parts of the legs may frequently be observed. Itis an interesting fact that these same markings mayoften be found on broncho ponies of the southwesternUnited States, derived from the old Spanish stock whichformerly ran wild. J . The domestic horse was named by Linnaeus Equuscaballus (from caballus, an old name for the horse, per-petuated today in the Spanish caballo; note also cabal-lero, a gentleman, i.e., a man who rides a horse). It didnot occur to Linnaeus that more than one species wasinvolved, but, as in the case of dogs and cats, it appearsthat the domesticated animal is derived through cross-ing from two or more originally wild forms. Evidenceof this is found in the prehistoric drawings on the wallsof caves i

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