1885.] NEW-YORK MICROSCOPICAL SOCIETY. 95 



CHILOMONAS PARAMECIUM. 



BY SARA GWENDOLEN FOULKE. 



{Received March -z^th, 1885.) 



Since its discovery by Ehrenberg, this form has been care- 

 fully studied by Butschli, Stein, and Kent, the two latter giving 

 the first entirely accurate diagnosis of its character. 



According to Kent, Chilomotias is classified as follows : Order, 

 Flagellata-Eustomata ; Family, Chilomonadidae ; Genus, Chilo- 



monas. 



Fig. I represents the form so accurately that no detailed de- 

 scription is necessary. 



Biitschli states that this animalcule, when isolated for observa- 

 tion, quickly loses its normal contour and becomes spherical, 

 finally disintegrating. 



While I was investigating a drop of water teeming with Chilo- 

 monas, a minute flagellate amoeboid form (Fig. 2) entered the 

 field, and after swimming uncertainly about for some moments, 

 settled to the bottom of the live-box, where it moved in amoe- 

 boid fashion, the two flagella becoming merged in the pseudo- 

 podia-like processes. The presence of about twenty small highly 

 refractive bodies, suspected to be germs, was noticed. Soon the 

 mass became so diffused as to form a mere film, and presently 

 disintegrated, setting free these bodies, which swam away. 

 Several similar individuals were found, some of which, on be- 



