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



Amoeba sp.? 



A small, very hyaline ameba of the proteus type was 

 common among the algae in the bowl of the spring (Station J), 

 at the point where the spring water flows into the larger pond 

 (Station E), on alga-covered poplar roots (Station D), and on 

 algae from a submerged stone (Station G). It was taken from 

 November to the end of February. 



Diameter 32-80/x. 



Amoeba radiosa Dujardin. 



This species was common in all collections from the bowl 

 of the spring (Station J). It was taken in algae at Stations 

 F, I and I', but occurred at these places only infrequently. 



Diameter of body 21-48)u; length of pseudopodia 84/x and 

 less. 



Amoeba verrucosa Ehrenberg. 



Juvenile and adult forms of this species were common from 

 November to the end of January in a few collections of algae 

 from Station G. They were taken occasionally at the entrance 

 of the spring into the larger pond (Station E) and on the alga- 

 covered poplar roots at Station D. 



Diameter 59-104^t. 



Amoeba villosa Wallich. 



This species was common during February and March in 

 the bowl of the spring (Station J) and on the fine black sediment 

 at Station M. 



Length 122-144^. 



Biomyxa vagans Leidy. PI. II, Figs. 1, la and lb. 



One individual was taken in early November among alga- 

 covered poplar roots at Station D. At first glance it appeared 

 to be sorAe non-living substance which was becoming fiattened 

 out, due to the weight of the cover glass. It moved slowly and 

 constantly, never keeping the same form two consecutive 

 moments; and the pseudopodia, which were hyaline, were very 

 difficult to see. One ellipsoidal granular nucleus could be 

 distinguished but the animal was not stained so that the 

 presence of other nuclear material in the cell was not determined. 

 Penard (1902) described some individuals with one globular, 



