. Cassell's natural history. Animals; Animal behavior. ^.^^^^^ ^. • '-- ^ ORDER RODENTIA. CHAPTER I. INTRODUCTION—THE SQUIEREL, SIARJIOT, ANOMALITRE, HAPLODONT, AND BEAVER FAMILIES. Character of the Order—A well-defined Group -Teeth Evidence—Kinds and Number of Teeth—The Incisors : their Growth, Renewal, and Composition—The Molars—The Gnawing Process—Skeleton—Brain—Senses—Body—Insectivora and Rodentia—Food of Rodents-Classification—THE SIMPLE-TOOTHED RODENTS—Characteristics—THE SQUIRREL-LIKE RODENTS—Scil'—Distinctive Features—The Common Squirrel—Form—Distiibution— Food—Bad Qualities—Habit
. Cassell's natural history. Animals; Animal behavior. ^.^^^^^ ^. • '-- ^ ORDER RODENTIA. CHAPTER I. INTRODUCTION—THE SQUIEREL, SIARJIOT, ANOMALITRE, HAPLODONT, AND BEAVER FAMILIES. Character of the Order—A well-defined Group -Teeth Evidence—Kinds and Number of Teeth—The Incisors : their Growth, Renewal, and Composition—The Molars—The Gnawing Process—Skeleton—Brain—Senses—Body—Insectivora and Rodentia—Food of Rodents-Classification—THE SIMPLE-TOOTHED RODENTS—Characteristics—THE SQUIRREL-LIKE RODENTS—Scil'—Distinctive Features—The Common Squirrel—Form—Distiibution— Food—Bad Qualities—Habits—The Gret Squirrel—The Fox Squirrel—Flying Squirrels—Their Paraclmte Membrane—The Taguax—Appearance—Habits-Other Species—The Polatouche—The Assaean—The Genus Xcrm —The Ground Squirkels—The Common Chipmunk—The Marmots—Distinguishing Featia-es—The Spermophiles —The Gopher—The Sisel, or Suslik—The Barking Squirrels-The Prairie Dog—Description—Species— Habits—Burrows—Fellow-inmates in their " Villages "—The True Marmots—The Bobac—The Alpine Marmot —The Woodchuck—The Hoart Marmot, or Whistler-ANOMALURIDjI;-Tail Peculiarity—Distinctive Features—HAPLODONTID^—Description—The Sewellel—CASTORID^—The Beaver—Skeletal Peculiarities General Form-Appeirance-Distribution—The Beavers of tlie Old and New World-Habits—Wonderful Sagacity —The Building Instinct—Their Method of Working—The various Stages—Their Lodges—Their Dams—Activity by Night-Flesh—Hunted—The Cmtormm. While the last few chaptei-s have been devoted to ordere which contain the largest and most powerful of terrestrial mammalia, we have now to treat of a gi'oup, all the members of which are of com- paratively small size. "Mice, rats, and such small deer," to use Shakspere's phrase, make uji a great proportion of the order Rodentia. The biggest of them is only about the size of
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