506 



THE AMERICAN NATURALIST 



[Vol. LI 



Conclusions 



1. Variations in density of the water of Great Salt Lake, cause 

 no corresponding variations in the size of Chlamydomonas sp. 

 cells. 



2. The indication is, that water somewhat less dense than that 

 normally present in the lake, at its present level, is most favor- 

 able- to the development of Chlamydomonas sp. 



3. The diatoms present in the lake multiply best in water 

 much less dense than the dense water at Saltair. 



4. At least four species of algae are to be found in the part 

 of the lake investigated. 



5. At least five varieties — possibly species — of bacteria have 

 adapted themselves to the severe conditions in the lake. 



In conclusion, I wish to heartily thank Professor C. T. Vorhies 

 for the suggestions he has given me in the preparation of this 

 paper. 



L. L. Daniels 



