SCIENTIFIC TERMS 
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5. Worms and wormlike animals. Examples, flat worms, tape 
worms, earthworms. 11,000 different kinds. 
6. Mollusca. The clams and snails. 61,000 different kinds. 
7. Arthropoda. Crabs and insects. 400,000 different kinds. 
a. Crustacea. Examples, crayfish and crabs. 10,000 different 
kinds. 
b. Insecta. Examples, grasshopper, flies, butterflies, bees. 
390,000 different kinds. 
II. Vertebrates. Animals with a backbone. 
1. Pisces. Examples, trout, perch, bass, cod. 13,000 different 
kinds. 
2. Amphibia. Examples, frog, salamander. 14,000 different kinds. 
3. Reptilia. Examples, snakes, turtles, alligators. 35,000 different 
kinds. 
4. Aves. Examples, sparrow, eagle, hawk, crow. 13,000 different 
kinds. 
5. Mammalia. Examples, horse, cow, sheep, monkey, man. 
35,000 different kinds. 
The plants, like the animals, are arranged in general 
groups which, beginning with the simplest, are as follows: 
I. Cryptogams. Flowerless or seedless plants. 
1. Thallophytes. 
a. Algae. 
b. Fungi. 67,000 different kinds. Examples, bacteria, molds, 
puff-balls, toad-stools. 
2. Bryophytes. 
a. Liverworts. 4000 different kinds. 
b. Mosses. 12,600 different kinds. 
3. Pteridophytes. 4500 different kinds of ferns. 
II. Phanerogams. Flowering or seed-bearing plants. 
1. Gymnosperms. Examples, pine, spruce. 540 different kinds. 
2. Angiosperms. Flowering plants proper. 
a. Monocotyledons. Example, corn. 23,700 different kinds. 
b. Dicotyledons. Example, bean. 108,800 different kinds. 
Scientific Terms. — Scientists in America, France, Ger¬ 
many, Russia, and elsewhere are continually studying 
different plants and animals. For their convenience the 
Latin names are usually adopted in advanced scientific 
