92 



INDEX. 



Dinobryon, annual distribution of, 17. 

 Daphnia hyalina, annual distribution of 



81. 



table of numbers per 



square meter in Green 



lake, 84. 



table of numbers per 



square meter in Lake 



Winnebago, 83. 



jowZezvar. pulicaria, annual dis 



tribution of, 32. 

 retrocitrva, annual distribution 



of, 31. 



Deep lakes, definition of, 6. 

 Diaptomus, rare ia Pelican lake, 60. 



gracilis, annual 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 par square 

 meter in Lake Winnebago, 

 78. 



Reighardi, 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. 



Elkhartlake, 6, 27. 



Epischura lacustris, annual distribution 



of, 25. 



table of numbers per 

 square meter in 

 Green lake, 79. 

 table of numbers per 

 square meter in 

 Lake Winnebago, 

 78. 

 Epittylis galea, annual distribution of,' 



19. 

 Eudorina, annual distribution of, 15. 



Eurycercus lamellatus, 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. 

 Qloiotrichia, 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, 6. 



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, 

 arge deep lakes more productive than 



small deep lakes, 68. 

 Larvae, copepod, annual distribution of, 



