2 
ANIMAL ACTIVITIES. 
Phylum 
or Sub¬ 
kingdom. 
Name of Sub- 
kingdom. 
Derivation of 
Name. 
A Few Characteristics. 
Familiar Examples 
I. 
Pro to zo'a. 
Gr. protos, 
first, and 
zoon, ani¬ 
mal. 
One-celled ani¬ 
mals. 
They do not re¬ 
produce by eggs. 
Amoeba, para- 
mecium, vor- 
ticella, chalk 
animals. 
II. 
Po rif'e ra. 
Lat. porus , 
a pore, and 
fero, to bear 
Animals having 
many cells 
much alike. 
Food enters the 
body by numer¬ 
ous openings. 
All sponges. 
III. 
Cge len te- 
ra'ta. 
Gr. koilos, 
hollow, and 
enteron , in¬ 
testine. 
Animals having 
hollow cylindri¬ 
cal bodies with 
only one open¬ 
ing, the mouth. 
Hydras, hy- 
droids, jelly¬ 
fish, corals, 
sea-anemones 
IV. 
E CHI NO- 
der'ma ta. 
Gr. echinos , 
a hedgehog, 
and derma , 
skin. 
Animals having 
very distinct ra¬ 
dial symmetry, 
having hard 
plates in the 
skin, and fre¬ 
quently covered 
by spines. 
Starfish, sea- 
urchins, sea- 
cucumbers, 
and stone- 
lilies. 
V. 
Ver'mes. 
Lat. vermis , 
a worm. 
Include a great 
variety of worm¬ 
like animals. 
Some have seg¬ 
mented bodies. 
Earthworms, 
leeches. 
VI. 
Ar throp'o- 
DA. 
Gr. arihron, 
a joint, and 
pous (pod), 
a foot. 
Animals having 
segmented bod¬ 
ies and jointed 
appendages. 
Grasshoppers, 
butterflies, 
spiders, cray¬ 
fish, crabs, 
centipedes. 
VII. 
Mol lus'ca. 
Lat. mollis, 
soft. 
Soft-bodied ani¬ 
mals, often en¬ 
closed in hard 
shells. 
Clams, snails, 
the nautilus, 
and the squid. 
VIII. 
Chor da'ta. 
Gr. chorde , 
a string. 
Almost all have 
back bones 
made up of parts 
called vertebrae. 
Fishes, frogs, 
turtles, 
snakes, birds, 
horses, and 
man. 
