92 



INDEX. 



Dinobryon, annual distribution of, 17. 

 Daphnia hyalina, annual distribution of, 

 31. 

 table of numbers per 

 square meter in Green 

 lake, 84. 

 table of numbers per 

 square meter in Lake 

 Winnebago, 83. 

 pulex var. pulicaria, annual dis- 

 tribution of, 32. 

 retrocurva, annual distribution 

 of, 31. 

 Deep lakes, definition of, 6. 

 Diaplomus, rare in Pelican lake, 60. 



gracilis, aunual distribution 

 compared with D. oregon- 

 ensis, 24. 

 graciloides, annual distribu- 

 tation compared with D. 

 oregonensis, 24. 

 minutus, annual distribution 



of, 22. 

 minutus and D. sicilis, table 

 of numbers per square 

 meter in Green lake, 77. 

 oregonensis, annual distribu- 

 tion of, 23. 



table of numbers per square 



meter in Lake Winnebago, 



78. 



ReigharcU, distribution of, 62. 



sicilis, annual distribution of, 



22. 

 siciloides, in Cedar Lake, 60- 

 62. 

 Diatoms, comparison of annual distribu- 

 tion in Green lake and Lake Winnebago 

 with results of other authors, 13. 

 Distribution, annual of the organisms of 

 of the plankton, 11. 

 annual of species, 60. 



Elkhart lake, 6, 27. 



Epischura lacuslris, annual distribution 

 of, 25. 

 table of numbers per 

 square meter in 

 Green lake, 79. 

 table of numbers per 

 square meter in 

 Lake Winnebago, 

 78. 

 Epistylii galea, annual distribution of, 



19. 

 Eudorina, annual distribution of, 15. 



Eurycercus laniellatus, annual distribu- 

 tion of, 34. 

 table of numbers 

 per square meter 

 in Lake Winne" 

 bago,85. 



Fauna of different classes of lakes, 62. 

 Fish, relative value of deep and shallow 



lakes for the production of, 67. 

 Flora of different classes of lakes, 62. 

 Fragilaria, annual distribution of, 12, 14. 



Geographical distribution of species, 60. 

 Gloiotrichia, annual distribution of, 16. 

 Green lake, 6, 7. 



comparison with Lake Win- 

 nebago, 5. 

 description of, 5. 

 plankton compared with that 

 of Lake Winnebago, 4. 



Heterocope, annual distribution of, 25. 

 Horizontal distribution, 51. 



conclusions in re- 

 gard to, 58. 

 depth a factor in, 



56. 

 table of collec- 

 tions, 53. 



Isolation important in producing differ- 

 ences in lake faunae, 61. 



Kofoid, 9. 



Laboratory on Lake Winnebago, 3. 

 Lakes, classification of, 6. 

 Lake Geneva, 6, 27. 

 Lake Winnebago, 8. 



character of work on, 4. 

 comparison with Green 



lake, 5. 

 description of, 2. 

 plankton compared with 

 that of Green lake, 42. 

 why chosen, 1. 

 Lakes visited other than Green lake and 



Lake Winnebago, 7. 

 Lakes of Wisconsin, maximum depths, 87. 

 Large deep lakes, 6, 

 Large deep lakes more productive than 



small deep lakes, 68. 

 Larvae, copepod, annual distribution of, 

 29. 



