CONTENTS 



PAGE 



General Taxonomic References viii 



Key to Animal Phyla i 



Key to Classes and Orders of Animals ..... 6 



Protozoa 6 



PORIFERA lO 



COELENTERATA II 



Ctenophora I 



Platyhelminthes 13 



Nemertini 2 



Nemathelminthes 14 



Trochelrhnthes 15 



Bryozoa i6 



Brachiopoda 3 



Annelida 17 



Echinoderma 18 



MOLLUSCA 18 



ArTHROPODA 21 



Crustacea 22 



Arachnida 25 



Myriopoda 27 



Insecta 28 



Young stages and wingless adults 28 



Winged adults 30 



Nymphs and wingless adults 34 



Larvae 37 



Pupae 42 



Special insect references 46 



Chordata 46 



Glossary 52 



vii 



^-.' k 



