440 
SCOUTING FOR GIRLS 
JELLY FISH 
to all; for instance, sponges, corals, starfishes, crabs, 
shrimps, lobsters, clams, and oysters. Others are seldom 
seen unless one takes pains to look for them. 
All life comes from pre-existing life. So every ani- 
mal living to-day has come from some other living animal 
and every plant living to-day has come from some other 
previously living plant. It is believed that the first forms 
of life came from the water. At any rate, the oldest and 
lowest forms of life to-day, the Protozoa, are found in 
the water. As these are nearly all very minute and can 
be studied only with a microscope, they are omitted from 
the suggested field work. 
All who have access to the seashore have a wonderful 
opportunity to study the Invertebrates. The long stretches 
