84 



PLANKTON OF WINNEBAGO AND GREEN LAKES. 



Table XVII. — Numbers of Daphnia hyalina per square meter in 



Green lake. 



Date. 



No. 



Date. 



No. 



Date. 



No. 



1899 





1900 





1901 





July 16.... 



13,328 



July ]6.... 



6,664 



June 22 



952 



Aug. 1.... 



93,396 



Aug. 4 



19,040 



July 8.... 



7,616 



Aug. 25 



4,760 



Aug. 18.... 



15,232 



July 20.... 



19,040 



Sept. 18.... 



3,094 



Sept. 3.... 



59,024 



Aug. 3.... 



6,664 



Oct. 4.... 



22,848 



Sept. 15 ... . 



3, 808 



Aug. 27.... 



26, 656 



Oct. 19.... 



26,894 



Sept. 29.... 



20,944 



Sept. 18.... 



24, 752 



Oct. 31 ... . 



1,190 



Oct. 16.... 



15,232 



Oct. 19.... 



3,808 



Nov. 27.... 



1,428 



Oct. 27.... 



17, 136 



Nov. 9 



13,328 



1900 





Nov. 10.... 



39,984 



Dec. 9 



238 



June 16 



476 



Nov. 24.... 



9, 520 







July 2.... 



1,904 











Table XVIII. —Numbers of Bosmina per square meter in Green 



lake. 



Date. 



No. 



Date. 



No. 



Date. 



No. 



1899 





1900 





1901 





July 16.... 



53,312 



June 2 



9,520 



Jan. 25.... 



19, 040 



Aug 1 . . . . 



3,808 



June 16 



7,61.6 



Feb. 9.... 



7,616 



Aug. 25 



2,380 



July 2.... 



635,936 



Feb. 28.... 



11,424 



Sept. 18.... 



23, 800 



July 16.... 



325,584 



Mar. 9 . . . . 



3,808 



Oct. 4.... 



21,752 



Aug. 4 



12, 376 



Apr. 1 



3, 808 



Oct. 19.... 



24, 752 



Aug. 18.... 



5,712 



May 4 . . . . 



1,904 



Oct. 31.... 



38,080 



Sept. 3 . . . . 



1,904 



June 22.... 



5,712 



Nov. 27.... 



173,264 



Sept. 15.... 



13,328 



July 8.... 



7,616 



1900 





Sept. 29 ... . 



5,712 



July 20.... 



3,808 



Jan. 13 ... . 



114,240 



Oct. 16.... 



1,904 



Aug. 3.... 



9, 520 



Jan. 20.... 



79,968 



Oct. 27.... 



5,712 



Sept. 18.... 



7,616 



Feb. 23.... 



74,256 



Nov. 10.... 



59.024 



Oct. 19.... 



3,808 



Mar. 22.... 



138,992 



Nov. 24.... 



20, 944 



Nov. 9 . . . . 



118,048 



Apr. 20.... 



36, 176 



Dec. 21.... 



19,040 



Dec. 9.... 



165,648 



May 5 



9,520 



1901 





1902 





May 21.... 



4,760 



Jan. 14 



3,808 



Feb. 19.... 



30, 940 



