. Beginners' Zoology . Fig. 390.—African Camel {Cameltts dromedarim). being swallowed. Explain the saying that if a cow stopschewing the cud she will die. Does a cows lower jaw move sidewise orback and forth ? Do the ridges on the molarsrun sidewise or lengthwise. Is acows horn hollow. Does ithave a bony core . (Fig. 344.) The permanent hol-low horns of the cowand the solid decidu-ous horns of the d^eerare typical of the twokinds of horns pos-sessed by prong-horned an- FlC. 391. — PKONn-IIOKNKi telope (Fig. 391) of (^Antelocarpa Americana).. Antelope 2l6 BEGINNERS ZOOLOGY the Uni

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. Beginners' Zoology . Fig. 390.—African Camel {Cameltts dromedarim). being swallowed. Explain the saying that if a cow stopschewing the cud she will die. Does a cows lower jaw move sidewise orback and forth ? Do the ridges on the molarsrun sidewise or lengthwise. Is acows horn hollow. Does ithave a bony core . (Fig. 344.) The permanent hol-low horns of the cowand the solid decidu-ous horns of the d^eerare typical of the twokinds of horns pos-sessed by prong-horned an- FlC. 391. — PKONn-IIOKNKi telope (Fig. 391) of (^Antelocarpa Americana).. Antelope 2l6 BEGINNERS ZOOLOGY the United States, however, is an intermediate form, as itshorns are hollow, but are shed each year. The hollowhorns are a modification of hair. Do solid or hollowhorns branch ? Which are possessed by both are Which are better suited for fight-ing . Why would the deer have less need to fight thanthe cattle ? Deer are polygamous, and the males use their

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