516 
PLANKTON OF QUIVER CREEK, SEPTEMBER, 1896, 
TO APRIL, 1897. 
Species. 
.| Dec. 
Jan. | Feb. | Mar.| Apr. |Total 
Algz—totals, .......------------ -+- 
Closterium acerosum... 
lunula........... --- 
gracile. 
Oscillatoria ep 
Unidentified ... 
Diatoms—totals . 
Amphbora... 
Cocconeis communis. 
Cyclotella.......... -..--- 
Cynatopleura solea. 
Diatoma vulgare 
Encyonema... 
Fragilaria vi 
Gomphonema constrictum 
Melosira spinosa_. 
varians... 
Meridion circulare 
Navicula spp.. 
SPitecec- 
Nitszchia Sigmoides. 
Pleurosigma angulatum. 
Surirella ovata......... 
splendida. - 
Synedra acus.. 
ulna.. 
Unidentified. 
Rhizopoda—totals ... 
Arcella angulosa. 
discoides... 
vulgaris. anaes 
Centropyxis aculeata. 
ecornis - sooo 
Cy phoderia a 
Difflugia acuminata 
acuminata bifida. 
constricta.. 
globwlosa 
Sp.- 
Gromia ‘Sp. : 
Trinema enchelys .. 
Mastigophora—totals 
Eudorina elegans. 
Phacus longicauda. 
Synura uvella____.......- 
Trachelomonas hispida . 
Unidentified - 
Rotifera—totals._ 
Cathypna luna 
Colurus obtusus. 
Conochilus sp. 
Distyla spp.- 
Mastigocerca. sp 
Metopidia solidus 
Notholca jugosa.. 
Philodina megalo 
Rotifer actinurus. 
Unidentified 
Rotifer eggs -..-.--. -- 
Entomostraca—tota Ss. 
Cyclops serrulatus. 
Nauplius.. a 
Ostracod... 
Miscellaneous— —totals.. 
Chironomus larva.. 
Unidentified insect 
4 
BoRBenad 
pane 
m 
FUR OLOUNN 
= 
wS8n8B 
Insect egg...--.-.---- 2} 
Unidentified egg. -......-- -----------eeceeeeeees|eeeeee ces eee crete eee = 8 Sececeesd 
Unidentified 2 |- = Es a bore ae 
Total number of species. 32 18 33 29 22 16 19 19 63 
‘Total number of individuals.. 794 \ 238 | 875 | 751 | 781 126, 261 | 2497 6323 
*Estimated. tEggs only. 
