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31 

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LIST OF PLATES 



1. Stonefly Nymphs Plecoptera 



o. -... ^ytiy isyn^t 



4. Dragonfly Nymphs 



5. Dragonfly N)anphs 



6. Dragonfly Njonphs 



7. Damselfly Nymphs 



8. Water Bugs 



9. Caddisworm houses 



10. Beetle larvae 



11. Crane-fly larvae 



12. Misc. two-winged flies 



13. Misc. Insects of several orders 



14. Crustaceans of several orders 



15. Clams and snails 



16. Misc. Invertebrates 



17. Blue-r 



18. Grf 



19. Desmids 



20. Diatoms 



21. Protozoans 



22. Flagellates 



23. Rotifers 



— 24. Entomostraca 



212_ 

 203 _ 



Uaoni 



Odonata 



Odonata 



Hemiptera 



Trichoptera 



Coleoptera 



Diptera 



Diptera 



MoUusca 



vanon 



V- 



•c 



100 

 95 



167. 



158. 



149 



140. 



131. 



122 



Desmidiacea 

 Bacillariaceae 95 



86 

 77 

 68 

 59 

 <50 

 41 

 32 



_ 75 

 _ 70 

 _ 65 

 _ 60 

 _ 55 

 — 50 

 U 



35 



30 



25 



20 



15 



10 



5 



— 



