CLASSIFICATION OF ANIMALS. 



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BRANCH IV. ECHINODERMATA. Rough skinned 

 animals. 



CLASS 1. Crtnoidea. —Crinoids, mostly extinct. 



2. Asteroidea. — Starfish. 



3. Echinoidea. — Sea urchin. 



4. Holothuroidea. — Sea cucumber. 



BRANCH V. VERMES. Worms. 



CLASS 1. Platyhelminthes. — Flat worms. 



2. Nematelminthes. — Thread worms. 



3. Rotatoria. — Rotifers. 



4. Polyzoa. 



5. Brachiopoda. — Have shells, like a clam. 



6. Tunicata. 



7. Nemertina. 



8. Enteropneusta. 



9. Oephyrea. 



10. Annulata. — Earthworm, leech. 



BRANCH VI. M0LLU8CA. 



CLASS 1. Lamellibranchiata. — Clam, oyster. 



2. Gasteropoda. — Snail. 



3. Cephalopoda. — Squid. 



BRANCH VII. ARTHROPODA. Jointed appendages. 



CLASS 1. Crustacea. 



Order I. Cirripedia. — Barnacles. 



3. Entomostraca. — Cyclops, etc. 



3. Tetradecapoda. — Sow bug, etc. 



4. Decapoda. — Crawfish. 

 CLASS 2. Myriapoda. 



Order 1. Chilognatha. — Have two pairs of legs to 



each segment. 

 2. Chilopoda. — Centipede. 

 CLASS 3. Arachnida. 



Order 1. Acarina. — Ticks and mite.s. 



2. Pedipalpi. — Daddy longlegs. 



3. Araneina. — Spiders. 

 CLASS 4. Insecta. 



Order 1. Neuroptera. — Dragon fly. 



3. Orthoptera. — Grasshopper. 



3. Hemiptera. — Squash bug. 



4. Coleoptera. — Beetle. 



5. Diptera. — House fly. 



6. Lepidoptera. — Butterfly. 



7. Hymenoptera. — Bumble bee. 



