254 
VERMES. | 
[ CLASSES. 
Insecta. 
ARTHROPODA. 
MOLLUSCA. 
CHORDATA. 4 
Crustacea. 
ANIMAL ACTIVITIES. 
Annulata. These are the more highly organized worms 
like the earthworms and leeches. They are com- 
monly regarded as a separate sub-kingdom or phylum. 
Thysanura, spring-tails. 
Pseudo-neuroptera, dragon-fly. 
Orthoptera, grasshopper. 
Hemiptera, aphis. 
Neuroptera, ant-lion. 
Coleoptera, potato-beetle, 
Diptera, house-fly. 
Lepidoptera butterfly. 
Hymenoptera, bee 
Spiders. 
Arachnida. Scorpions. 
Mites. 
Centipedes 
Myriapoda. | miltipedes 
Here belong the crayfish, lobster, shrimp, crab, 
sand-hopper, pill-bug, asellus, cyclops, daphnia, 
fish-lice, barnacles, and many other arthropoda 
which breathe by means of gills. 
CLASSES. 
Pelecypoda, or bivalve mollusks, like clams, oysters, 
and scallops. 
Gastropoda, or univalve mollusks, like slugs and snails. 
Cephalopoda, including the squid, octopus, and nauti- 
lus. 
| Amphineura, including the chitons. 
{ Omitting some low forms of somewhat doubtful re- 
lationship, we may call all animals belonging to this 
sub-kingdom Vertebrata and include them in classes as 
given below. 
CLASSES. 
Cyclostomi, including the lancelet or Amphioxus. 
Pisces, including all fishes. 
Amphibia, including frogs and their allies. 
Reptilia, including snakes and turtles. 
Aves, including birds. 
Mammalia, including the higher animals bearing hair 
or fur and provided with glands secreting milk. 
Man belongs to this class and to the order Primates, 
| to which order the monkeys also belong. 
VOCABULARY. 
Am phi ox’us (Gr. amphi, on both {| Arche op’te ryx (Gr. archaios, 
sides), and oxys, sharp), a small ancient, and pteryx, a wing), a 
fish-like vertebrate. It is also fossil bird. 
called the lancelet. A’ves (Lat. avis, a bird), birds. 
An nu la’ta (Lat. annulus, a little | Di’a phragm (Gr. dia, through, 
ring), a divis 
By 
ion of Vermes in- and phragnymt, to enclose), a 
cluding the common earth-worm, muscle characteristic of mam- 
