FRESH WATKK LIFE. 17 



the scissors and cut the two basins apart and separateil them for 

 fear that the saails would crossover. The grass did better in 

 No. 5 than No. 4, growing to al)Out three feet in length over the 

 edge of the basin and table and sweeping the floor. I had to 

 set H basin under the grass on the floor, as the water siphoned 

 over on the grass at the rate of al)out half a wash-basin per 

 day. General appearance to ihe naked e^'e: Immense numbers 

 of animals swimming like cyprids or chydori, but varying in 

 number in cycles like No. 4. At the end of three years and four 

 months, viz., Dec. 17th, 1904. the following: Lemna trisulcha. 

 Vaucheria, Nitella, Riccia natans and Riccia fluitan^. all gone. 



Salvinia natans, still living, but the leaves seemed smaller 

 and there did not seem to l)e many new ones sprouting. Lemna 

 minor, plenty of it, but about half of it seemed to have turned 

 white and died; the rest seemed fairly healthy. 



Dichelyma, flourishing. 

 Microscopic examination. 



Desmids. 



None. 



Diatoms. 



A few Fragillaria ca[)ucinffi. 



'' " Cymbella gastroides, recent and frustules, 



" " Surrirella splendida. 



Navicula Subgigus shells. 



Other forms. 



Pterodina> patinse, a few plates, 



A feu- Chydori, lively, 



A large number of shells of chydorus everywhere. 

 Large numbers of hydrai'hne belostoma all over the Dich- 

 elyma everywhere, but none anywhere else. A large number 

 of cyprid shells, none alive except one on Salvinia leaf. Vorti- 

 cellse plentiful, a few paremacea, and that was all after pro- 

 longed examination. I forgot to mention that some days after 

 Nos. 4 and 5 were put up a large number of small flies were 

 found dead and floating on the surface of the water, which I 

 supposed were chironomous larvoe which had assumed the fly 



