Group Finding List 



PLANTS 



(Algae only; higher groups not treated.) 



Plate Figs. Key 



Diatoms 20 All p. 48 



Desmids 19 All 46 



Blue-Greens 17 All 40 



True Greens 18 All 44 



ANIMALS 



Protozoans: one-celled animals 21 All 49 



Metazoans: many-celled animals 



Coelenterates, Hydra 16 4 



Plathelminthes, flatworms 16 10 



Nemathelminthes, roundworms 16 12 



Trochelminthes, rotifers 23 and 16 11 5^ 



Gasterotricans 16 3 



Annelids: 



Oligochetes, bristle-worms 16 7 



Hirudineans, leeches 16 9 



Bryozoans, moss animalcules 16 " 6 



Molluscs, clams and snails 15 All 38 



Arthropods: 



Arachnids, spiders and mites 16 1 and 2 



Crustaceans: 



Malacostracans 14 . . 36 



Entomostracans 24 and 14 . . 59 



Hexapods, Insects: 



Collembola, springtails 13 13 



Plecoptera, stoneflies 1 All 7 



Ephemerida, mayflies 2 and 3 All 8 



Odonata, dragonflies 4-7 All 14 



Hemiptera, water bugs 8 AH 20 



Trichoptera, caddis worms 9 All 24 



Neuroptera, spongiUa-flies, etc 12 8-10 30 



Coleoptera, beetles 10 and 13 1- 7 26 



Diptera, two-winged flies 11 and 12 All 28 



Lepidoptera, moths 13 11, 12 



Vertebrates, fishes, frogs, etc. (not included). 



AIDS 



Recognition characters of the principal groups of crustaceans 36 



Recognition characters of aquatic insect larvae 34 



See also List of Plates inside front cover. 



