78 



PLANKTON OF WINNEBAGO AND GREEN LAKES. 



Table V. — Numbers of Diaptomus iregonensis per square meterin 

 Lake Winnebago. 



Date. 



July 5-11. 

 July 12-18. 

 July 19-25. 

 Ju.26-Aug. 

 Aug. 2-8. 

 Aug. 9-15. 

 Aug. 16-22. 

 Aug. 23-29. 

 Aug. 30- 



Sept. 5 . . . 

 Sept. 16... 



Oc 

 Oct. 



Nov. 

 Nov. 



7... 



21... 



4... 



25... 



1900. 



Jan. 1... 



Jan. 27... 



Feb. 17... 



No. 



12,138 

 12, 852 

 44,030 

 54,978 

 33, 320 

 21, 420 

 21, 896 

 16, 184 



19, 992 

 37, 128 



8,092 

 17, 138 

 39, 984 



9,758 



714 

 952 

 238 



Date. 



1900. 

 Mar. 3 

 Mar. 17 

 Mar. 27 

 Apr. 28 

 May 11 

 May 24 

 June 9 

 June 25 

 July 9 

 July 28 

 Aug. 22 

 Sept. 8 

 Sept. 22 

 Oct. 6 

 Oct. 20 

 Nov. 6 

 Nov. 21 

 Dec. 5 



No. 



238 



476 



952 



7,616 



952 



16,184 



16,184 



19, 992 



18, 564 



20, 944 



34,272 



19, 516 



15, 232 



5,712 



11,424 



21,182 



7,616 



2,856 



Date. 



1901. 



Jan. 

 Feb. 

 Feb. 

 Mar. 

 Mar. 



5. 

 J2. 

 16. 



2. 

 16. 



April 13 

 April 27 

 May 11 

 June 8 

 June 25 

 July 12 

 July 27 

 Aug. 24 

 Sept. 13 

 Sept. 28 

 Oct. 12 

 Nov. 2 

 Nov. 16 



No. 



357 



595 



357 



238 



714 



5,712' 



9,044 



2,380 



48,552 



952 



21,896 



11, 186 



94, 486 



119,000 



7,616 



15, 708 



44,006 



32,368 



Table VI. — Numbers of Episehura lacustris per square meterin 

 Lake Winnebago. 



Date. 



No. 



Date. 



No. 



Date. 



No. 



1899 





1899 





1900 





July 5-11. 



714 



Aug. 16-22. 



476 



June 9 



6,188 



July 12-18. 



13,566 



Aug. 23-29. 



1,428 



June 25 



238 



July 19-25. 



2,656 



Aug. 30- 





July 9.... 



5,950 



July 26- 





Sept. 5 



952 



July 28.... 



476 



Aug. 1 



31,178 



Sept. 16.... 



476 



Aug. 22.... 



238 



Aug. 2- 8. 



1,428 



1900 





Sept. 22.... 



238 



Aug. 9-15. 



1,666 



May 24.... 



714 







