Beginners' zoology . Fig. 380. — Manatee, or sea cow; it lives near the shoreand eats seaweed. (Florida to Brazil.) 210 BEGINNERS ZOOLOGY Hoofed Mammals.—All the animals in this order walkon the tips of their toes, which have been adapted to thisuse by the claws having developed into hoo/s. The orderis subdivided into the odd-toed (such as the horse with onetoe and the rhinoceros with three) and the even-toed (asthe ox with two toes and the pig with four). All the even-toed forms except the pig and hippopotamus chew the cudand are given the name of ruminants. Horse and Man Compared. — To which
Beginners' zoology . Fig. 380. — Manatee, or sea cow; it lives near the shoreand eats seaweed. (Florida to Brazil.) 210 BEGINNERS ZOOLOGY Hoofed Mammals.—All the animals in this order walkon the tips of their toes, which have been adapted to thisuse by the claws having developed into hoo/s. The orderis subdivided into the odd-toed (such as the horse with onetoe and the rhinoceros with three) and the even-toed (asthe ox with two toes and the pig with four). All the even-toed forms except the pig and hippopotamus chew the cudand are given the name of ruminants. Horse and Man Compared. — To which finger and toeon mans hand and foot does a horses foot correspond ? (Figs. 381, 383, 399.)Has the horse kneecaps ?Is its heel bone large orsmall ? Is the fetlock ontoe, instep, or ankle?Does the part of a horseshind leg that is most elon-gated correspond to the. thigh, calf, or foot m Fig. 381. — Left leg of man, left hind legof dog and horse; homologous partslettered alike. man. On the fore leg,is the elongated part theupper arm, forearm, (Figs. 395, 399.)Does the most elongatedpart of the fore foot correspond to the finger, the palm, orthe wrist? (Fig. 382.) On the hiqd foot is it toe, instep, orankle? Is the fore fetlock on the finger, the palm, or thewrist? (Figs. 382, 385, 399.) Is the hock at the toe,the instep, the heel, or the knee? Specializations of the Mammals. — The early mammals,of which the present marsupials are believed to be typical,had five toes provided with claws. They were not veryrapid in motion nor dangerous in fight, and probably ateboth animal and vegetable food.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1921
