218 ANIMAL ACTIVITIES. 
The Mammalian Skeleton. For this study the 
class should be provided with at least one entire 
mammalian skeleton. A sheep’s head, with the 
vertebre of the neck, and a sheep’s legs may be 
bought at almost any market. The muscles and 
tendons can be easily removed after boiling. Heads 
and limbs of fowl, rabbits, frogs, and other ver- 
Fic. 176.—Human Skull. J, side view. 
tebrates should also be obtained at the markets 
and prepared for class use. A human skeleton, or 
a large chart showing the bones of the human 
body, should be used as a basis for comparison. 
Indeed a number of charts, showing parts of 
skeletons of a variety of mammals, should be at 
hand. 
