\ O j?>-. 



CONTENTS 



PHYLUM ARTHROPODA ^^^^ 



A Wasp i 



A Large Beetle 4 



A Fly 5 



A Large Grasshopper 7 



An Insect Larva : A Caterpillar i5 



A Centiped (Lithobius) i7 



A Spider i8 



A Crayfish or a Lobster 21 



A Crab 33 



A Sow Bug {Porcellio, Oniscus, or Armadillidium) 36 



A Fresh-water Shrimp (Gammarus) or a Sand Flea (Talorchestia) 38 



Caprella 39 



Larval Decapods 40 



A Free-swimming Copepod (Cyclops) 42 



A Daphnid 45 



A Nauplius Larva 47 



PHYLUM ANNELIDA 



The Sandworm (Nereis) 49 



An Earthworm 54 



PHYLUM VERMES 

 SUBPHYLUM PLATYHELMINTHES 



A Planarian Worm 62 



A Tapeworm ^5 



SUBPHYLUM BRYOZOA 



BUGULA ^9 



V 



:? 7 /, 3 3 



