THE PROTOZOA 11 



lightest portion on to the paper, then collect, and pour into 

 any suitable receptacle. 



The surface of the sand may also be scraped to the same 

 end, but this plan takes up an unnecessary quantity of 

 sand. 



The gathering when brought home must be thoroughly 



Fig. 2. Mixed Foraminifera. Photo-micrograph about 20 diameters 



dried on the stove or before the fire, and then when quite 

 cold, not before, it must be tipped, a spoonful at a time, 

 into a basin of cold water, and well stirred with the spoon. 

 The stirring must be considerable, or little bells of air will 

 adhere to sand grains, and cause these to float as well as 

 the little hollow shells we desire. However, the sand will 

 sink and the air-charged shells will float. Now collect and 



