212 ANIMAL ACTIVITIES. 
Do both upper and lower jaws move? Can the 
jaws move sidewise ? 
How many teeth has a cat? How do they differ in 
shape from those in the human body ? 
The dental formula for man is written 23, c}, py $, 
m3. This means that in man there are in each half- 
jaw two incisors, or cutting teeth, 
one canine or pointed tooth, two 
premolars, small grinding teeth, 
and three molars, large grinding 
teeth. Write the dental formula 
for the cat. 
What peculiarity do you notice 
Fic. 167.—Teeth of Man. about the tongue of the cat ? 
Are the long hairs near the 
cat’s mouth especially sensitive? Do you think they 
are of any use to the cat in searching for prey? 
What is the shape of the external ear of the cat? 
In what direction do the ears point? Are they better 
fitted to hear noises in front or behind ? 
Fic. 168.—Teeth of Dog. 
How do the cat’s ears compare with those of a 
rabbit ? What difference in habit may be indicated by 
the difference in ears? 
