■96 The Ohio Journal of Science [Vol. XX, No. 4, 



far below that of those taken at stations where more decaying 

 material was present. One suctorian, Sphaerophrya urostylce, 

 occurred frequently. 



STATION F. 



Greenish brown sediment at bottom, in a spot well exposed to 

 light most of the time, but shaded partly by floating algcz. 



This station was located at the same place as Station C, 

 but the mode of collection was different, sediment from the 

 bottom being taken. The water was about six inches deep 

 and a large mass of algae floated at the surface during part of 

 the period of study. The presence of a thick sheet of ice 

 for about two months did not interfere with the collecting at 

 this station. The pipette was inserted through a hole in the 

 ice, and the sediment taken from the bottom. This sediment 

 was always plentiful and of a greenish brown color. The 

 flagellates Euglena sp.? and Euglena deses predominated here, 

 although they never became abundant. Carteria multifilis was 

 plentiful during October. 



STATION G. 



Algae on submerged rock in clear water, well exposed to light. 



This station was located in the larger pond on a large flat 

 boulder about two feet from the shore and just east of the 

 spring. The submerged portions were thickly covered with 

 algae (mostly Spirogyra fluviatilis). The water was clear and 

 was shaded for only a part of the morning. Because of the 

 proximity of this station to the spring, ice never became thick 

 enough to interfere with collecting. About this stone the gold- 

 fish cohected in large schools, for here the caretaker threw drieds 

 bread to them occasionally. Algae were scraped from this 

 stone and examination of this material showed a remarkable 

 variety of forms throughout the period of study. Phacus 

 pyrum, Coleps hirtus, Prorodon teres, Strombidium gyrans, and 

 Aspidisca costata were plentiful in this locality. Stentor 

 coeruleus was so abundant during January that it formed a 

 •blue scum over the algae. 



STATION H. 



Dead algae (Oedogonium) forming a bright yellow, flocculent 

 mass on bottom. Spot well lighted most of the day. 



