76 THE LIFE OF DEVIL8 LAKE 



Oxytricha which was still living:, althn inactive, after a 25-26 hour 

 confinement beneath a cover glass in a sealed Petri dish. 



Many Protozoa occur in the lower levels of the lake and in 

 the ooze at the bottom, where dissolved oxygen (as shown by the 

 Winkler test) is absent. This is discussed elsewhere in this report.* 



One hundred and six species are recorded from the lake, a list 

 of which follows. 



Amcha proteus. Found occasionally at several points iti the 

 main lake. Also reported from East Lake. 



Ameha radiosn. Eare. Taken in Euppia in I\Iinncwa\dvan Bay. 

 Also reported from Lake A. 



Ameha Umax. "Associated with Euppia and algae at the 

 head of Creel Bay . . .and the east side of the main lake (numer- 

 ous) ", also taken ("numerous") in Lake A and Mission Lake 

 (1917). 



Amelia rerrucosa. "Observed but once." 



A7neba gnitula. Of fairly common occurrence in the lake. 



Amoeba striata. One specimen noted in a plant infusion from 

 Stump Lake. 



Auieha vitraca. Eare. 



Difflugia pyriformis. Taken in Lake A near seepage from a 

 fresh water spring. 



Difflugia constricta. Found near the ou.tlet of the l^evils Lake 

 sewer in Creel Bay, and in Lake A near seepage from a spring. 



Arcella vulgaris. Found in ooze in Creel Bay, and abundant 

 in Lake A near seepage from a spring. 



Cyphoderia ainpidla. "One specimen only has been observed." 

 Taken in Euppia. 



Euglypha alveolata. '"Observed but once" in the overflow of 

 a tank of lake water. It is jiossible that this species does not occur 

 in the lake, its presence in the lake water overflow may have been 

 accidental. 



Actinoplirys sol. Eare, in Eui)pia from ^linnewaukan Bay. 



Cercomonas sp. "Probably Cercomonas longicauda. . . . 

 Observed in infusions from Stump Lake only." 



Manas sp). Three difit'erent species have been found in the oo/e 

 from Creel Bay. 



Ileteromita glohosa. " Li dredged material from Creel Bay." 



Heteromita sp. "Probably . . . ovata." Taken from ooze 

 on rocks near the Station. Also taken in Lake A. 



TrepoiHonas agilis. Common in ooze and Ruppia cultures fr"om 

 all parts of the lake. 



Euglena viridis. Occurs occasionally at various points in the 

 main lake. Also taken in Lake A. 



"See pp. 100-7. 



