46 
FIRST BOOK. 
in the front row for seizing and cutting its food, 
and when they are lost or worn away, those in 
the hinder rows grow forward to take their places. 
8. When the shark is about to seize anything 
that is above it in the water, it has to turn over 
on its back, because its mouth is so far under the 
lower part of its head. 
9. Its body is just the right shape for passing 
swiftly through the water. It is rounded, and 
tapers off at its thick, fleshy tail, which ends with 
a very large fin. By swinging its strong tail, the 
shark drives itself along very fast, as it hunts 
after other fishes. 
10. The shark's skin has very hard and horny 
scales upon it, and it is so rough that pieces of it 
may be used to polish wood. Sometimes purses 
and other fancy things are made of shark's skin, 
for it becomes hard and shiny, and, as you might 
expect, is very strong. 
BEES. — I. 
1. In the nest or hive of the honey-bee there 
are three kinds of bees. There is first the queen, 
or mother, which lays the eggs, and is larger than 
the rest. Then there are the ivoi^kei^s, that build 
ceils, gather honey, feed the young, and guard the 
