A COUNTRY DUCK-POND. 



117 



of action. Our piece of water was simply a (Wvij 

 (luck-pond, in which no hirge plants were growing, 

 and whicli did not even exhibit the little disks of 

 duckweed, that are common to such situations. 

 Tliere was, liowever, on tlie surface, in parts, an 

 exceedingly fine scum of pale yellow green, and 



x;-' 



?00 

 Or yptomoiiiul - Euglcna. 



this, armed witli a tea-spoon, we proceeded to attack. 

 By careful skimming, a small bottle Avas half-filled 

 with minute organic particles, which Avere likely to 

 be interesting in themselves, and pretty sure to be 

 the food for something else. A small drop was placed 

 on a tablet of the live-box, flattened out by the 

 application of the cover, and viewed with a power 



