vi CONTENTS 



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Species Bottle-Nosed Dolphins ( Tursiops) Rough-Toothed Dolphins (Steno) 



Long-Beaked River Dolphins ( Sotalia) Chinese Dolphin Squalodonts and Zeu- 

 glodonts (Squalodontidce and Zeuglodontidce), . . ... 1195 



CHAPTER XXXI. THE RODENTS, Order Rodentia. 



General Characteristics of the Order Teeth Mouth Distribution and Habits Afri- 

 can Flying Squirrels (Anomaluridce) The Squirrel Family (Sciuridce) Groove- 

 Toothed Squirrel (Rhithrosciurus) Spiny Squirrels (Xerus) True Squirrels (Sci'u- 

 rus) European Squirrels Distribution North American Squirrels Oriental 

 Squirrels Ground Squirrels, or Chipmunks ( Tamias) Susliks, or Gophers (Sper- 

 mopkilus) Prairie Marmots (Cynomys) True Marmots (Arctomys) Distribution 



Old-World Species American Species Allied Extinct Rodents Flying Squir- 

 rels Lesser Flying Squirrels (Sciuropterus) Distribution and Habits Larger 

 Flying Squirrels (Pteromys) Woolly Flying Squirrel (Evpetaurus Pygmy Squir- 

 rels (Nannosciurns) The Sewellels (Haplodontidce) Common Sewellel (Haplo- 

 don) Californian Sewellel The Beavers (Castoridte) European and American 

 Species (Castor) Distribution of the European Beaver Range of the American 

 Species Habits Uses and Trapping. of Beavers Extinct Beavers, . . 1238 



CHAPTER XXXII. RODENTS, continued. 



THE MOUSE-LIKE RODENTS. The Dormice (Myoxidtz) Common Dormouse (Muscar- 

 dinus) Squirrel-Tailed and Garden Dormice ( Myoxus) Tree Dormouse Extinct 

 Dormice Jumping Mice and Jerboas (Dipodidce) The Jumping Mouse (Zapus) 



The Five-Toed Jerboas Kirghiz Jerboa (A lactaga) Afghan Jerboa Yarkand 

 Jerboa (Euchoretes) Broad-Tailed Jerboas (Platvcercomys) Three-Toed, or True 

 Jerboas (Dipus) Habits of Egyptian Jerboa African Jumping Hare (Pedetes) 

 The Sminthus (Sminthus) The Mouse Tribe (Muridce) Australian Water Rat 

 (Hydromys) Queensland Rat (Xeromys) Malabar Spiny Mouse (Platacantho- 

 mys) The Gerbils (Gerbillus) Philippine Rat (Phleeomys) Hamsters and 

 White-Footed Mice ( Cricetus) Common Hamster and Its Habits Species of 

 White-Footed Mice The Fish-Eating Rat (Icktkyomys) Grooved-Toothed Mice 

 (Rhitfirodontomvs and Rhithrodon) Wood Rats ( Neotoma) African Crested Rat 

 (Lop/iiomys)The Voles (Microtus) Water Vole Short-Tailed Field Vole 

 Bank Vole Alpine Vole Other Species Lemmings (My odes} Banded Lem- 

 ming (Cuniculus) Musquash (Fiber) Mole-Like Voles (Ellobius and Siphneus) 



Rats and Mice (Mux) Brown Rat Black Rat House Mouse Long-Tailed 

 Field Mouse Harvest Mouse Other Species Bandicoot Rats (Nesocia) Bush 

 Rats (Golundd) Spiny Mice (Acomys) Jerboa Rats (Hapalotis} Lichtenstein's 

 Rat (Mastacomys) Mole Rats (Spalacida) Great Mole Rat (Spalax) Bamboo 

 Rats (Rliizomys') Cape Mole Rats (Bathyergus) Naked Sand Rats (Heteroce- 

 phalus) American Pouched Rats (Geomyida:} Pocket Gopher (Geomys) 

 Northern Pocket Gopher ( Thomomys') Kangaroo Rats (Dipodomys) Pocket 

 Mice (Perognathus and Heteromys), ....... 1276 



CHAPTER XXXIII. RODENTS, continued. 



THE PORCUPINE-LIKE RODENTS. General Characteristics of the Group The Octodont 

 Tribe (Octodontida:') The Gundi (Ctcnodactylus) The Degu (Octodon) The 

 Tucotucos (Ctenomys) The Coypu (Myopotamus'} The Hutias ( Capromys} Pla- 

 giodon The Cane Rat (Aulacodus) Other Genera The Porcupines (Hystri- 

 cidce) Canadian Porcupine (Erctkizon) Tree Porcupines (Synetheres) Brazilian 

 and Mexican Species Thin-Spined Porcupine (Chcetomys) True Porcupines 

 (Hystrix) Brush-Tailed Porcupines (Atkerura) Gianther's Porcupine ( Trickys) 



