310 THE A31KRICAN MONTHLY [Nov., 



mont must be used. In tlii.s climate it is best, ivltliou^h not 

 jibsolutoly necessary, to remove the entrails. Place the speci- 

 men, carefully wrapj»ecl in rags, in plenty of this preparation. If 

 wanted to mount, drain ofT the supcrtUious oil and mount in 

 glycerine. 



The Chicago Watcr-Supply in the World's Fair Grounds. 



h\ SMITH KLY JKLLIITE, M. D., 

 BROOKLYN, N. Y. 



During a short stay at the Fair grounds, I was enabled 

 through the courtesy ot Doctors LcGarde, U. 8. A., and E. H. 

 Wilson, to lilter some water sujiplied to the Fair in the build- 

 ing of the U. S. Army Hospital. The material was gathered by 

 filtration through alisorbent cotton, the cotton then being washed 

 out in a beaker of water. Though the list is not in any sense 

 as complete as the lists supplied by Messrs 1>. W. Thomas and 

 H. H. C'hace, still it may be of interest to some of the microscop- 

 ists who have not access to these communications. The filtra- 

 tion was done in the last week of August and material was re- 

 served for future study which material was lost by fire. 



VEGETABLE FORMS. 



CYAXOPHYCESe. 



Oscillaria, sp. indet. Too fragmentary. 



DESMIDE^. 



Penium. sp. indet. 

 Staurastruvi cuspidatum, Breb. 



I)IAT0ME.iE. 



Encyonema ventricosa. Kg. 

 Navicula railinsa, Kg. 

 N. rhyncocephala. 

 Pleurosigma spenceri, W. S. 

 Synedra ulna, (Nitzsch). Ehr. 

 S. pulchella. Kg. 

 S. longisssma, W. S. f?). 

 Progilaria capucina, Desm. 

 Asterirmellaformosa, Hass 

 Tabellaria floculosa. (Koth;. Kg. 

 T. fenestrata, Kg. 



