72 
HAROLD’S DISCUSSIONS. 
flies until there were nectar-producing blossoms to 
sustain them. The air was not enlivened bj the song 
of birds; perhaps the flnest music 
to be heard was a caw^, a croak, or a 
chirp along the marshy inlets. 
A few animals with a pouch in 
which they carried their young, the 
first to feed their young on milk, 
came into being about the middle 
of this period, but it was only a 
prophecy of what the succeeding 
Fig, 43.—Cephaloid age would bring forth. Another 
with coil of pecul- vibration of the crust was the signal 
lai shape. introduction of a new order 
of life. The curtain was raised for the enactment 
of the next chapter. 
