CLASS-BOOK OF ZOOLOGY. 45 



yards long. Their flesh is very good ; they eat only grain, 

 never drink, and are very gentle animals. They are 

 easily tamed, like the Marmot. 



§ 155. The Jumping Mouse (Gerbillus Canadensis) is 

 of the size of a common mouse, reddish brown ; has very 

 short fore, but long hind legs ; a round, long, and scaly 

 tail, like a rat. It is found in Canada, and as far south as 

 Pennsylvania, in the grain and grass fields. 



QUESTIONS ON SECT. VII. 



§ 136. What are Gnawers ? 



§ 137. By what is it shown that they are herbivorous ? 

 § 138. Describe the Beaver, and its use. 

 § 139. Describe the Muskrat. 

 § 140. Describe the Field-mouse. 

 § 141. Describe the Marsh Campagnol. 

 § 142. Describe the Norway Rat. 

 § 143. Describe the Black Rat. 

 § 144. Describe the Mouse. 

 § 145. What do you know of White Mice? 

 § 14(3. Describe the Rustic Mouse. 



§ 147. Describe the Squirrel, and name the different species found in 

 the United States. 

 § 148. Describe the Maryland Marmot. 



§ 149. Describe the Canada Porcupine, its peculiarities and use. 

 § 150. Describe the Guinea-pig. 

 § 151. Describe the American Hare. 

 § 152. Describe the Common Hare. 

 § 153. Describe the Rabbit. 

 § 154. Describe the Jumping Hare. 

 § 155. Describe the Jumping Mouse. 



SECTION VIII. 



5th Order — One-hoofed Mammalia : (Solidungula.) 



§ 156. One-hoofed Mammalia are those which have on 

 each foot a hoof, six front teeth and twelve grinders in 

 each jaw, no canine teeth, and which are herbivorous. 

 The Horse, the Ass ? and the Zebra, belong to this Order. 



§ 157 The Horse (Equus Caballus) is a domestic ani- 



