516 



PLANKTON OF QUIVER CREEK, SEPTEMBER, 1896, TO APRIL, 1897. 



Species. 



Sept. 



Oct. 



Nov. 



Dec. 



Jan. 



Feb. 



Mar. 



Apr. 



Total 





26 

 2 

 10 



8 



6 



651 



10 



2 



130 



24 



2 



28 

 4 

 16 



2 



6 



194 



52 

 12 

 6 



22 



12 



684 



14 



8 



4 



8 



10 



2 



150 





18 





34 



gracile 



2 



4 



8 



676 



2 

 8 



2 



4 



2 



730 







4 



2 



2 



90 



8. 

 222 



8 

 2470 



58 



Unidentified 



Diatoms — totals 



Amphora .»_.. •_.._ 



36 



5717 



12 



4 













12 







180 

 400* 









2 





40 



2 



312 

 16 



6 



6 



20 



30 



128 



10 

 2 

 8 



6 



4 

 2 



8 

 10 



2" 



2 



4 



20 

 52 



4 



2 



4 

 162 



824 





518 





6 







20 



Melosira spinosa 



2 

 9 



22 

 100* 







""""8 



8 



16 



38 



8 



4 



45 





16 



4 



288 



sp.~- ; 



100 





2 



2 

 4 



38 



94 

 4 



34 









4 





4 



4 



342 



2 



"iis" 



8 

 2 

 2 

 10 









4 



14 



2202 

 6 



14 



14 



2 



218 



68 



2 

 176 



278 



4 



2 



41 



32 

 38 



6 



18 



172 



14 

 956 





2860 







16 







6 

 46 



30 

 4 



22 



10 





86 



283 





4 



discoides 





2 



2 

 2 

 4 

 2 



2 

 11 

 2 

 6 





2 





4 





2 

 2 

 8 



4 





2 

 4 



4 



4 

 4 



4 



4 

 6 



20 





35 





2 

 2 



10 



2 





16 







32 





2 





54 



8 



32 



14 



2 



4 



18 



2 

 4 





2 

 6 



2 



2 





10 



2 



2 



152 



2 





2 



2 



2 

 2 

 48 



8 



Trinema enchelys 





16 





2 



2 



54 

 2 







2 













2 







46 











46 





2 





2 



2 







2 



22 



6 











2 





17 



2 

 2 



2 



6 



2t 



2 



4 



57 





8 





2 



2 







2 



Distyla spp. 



4 





10 



2 





14 





2 









2 





2 







4 













2 



2 









2 











2 



sp.- - 



Unidentified 



5 

 4 







2 



9 



7 



2 



2 



"" 2 



4 

 2 



2 



5 





2 



8 

 1 



3 

 4 

 15 

 1 



14 





2 



10 



4 







10 



Cyclops serrulatus 











1 







5 





12 

 4 



2 



2 







4 



18 

 6 



2 

 8 

 2 



3 

 1 



2 





3 

 1 



62 



Chironomus larva 



20 



2 





2 





2 



22 







10 



Unidentified 



6 











8 





32 

 794 



18 

 238 



33 



875 



29 



751 



22 

 781 



16 

 126 



19 



261 



19 



2497 



63 





6323 







*Estimated. 



tEggs only. 



