PELOGLOEA Lauterborn 1913, p. 99 



Cells bacilliform, straight or slightly twisted, often knobby and 

 irregular (in our specimens), solitary or in short linear series; 

 crowded within an amorphous or irregularly globular gelatinous 

 matrix. 



Pelogloea bacillifera Lauterborn 1917, p. 430 

 PI. 104, Figs. 4, 5 



Characteristics as described for the genus; cells bacilliform, 

 straight or curved rods, sometimes elliptic, slightly tapering at the 

 poles, solitary or 2-3 in linear series; densely crowded in a gela- 

 tinous, saccate or clathrate mucilage; cells 0.6-1.5/1, in diameter, 

 2-4/1, long. 



When this plant was collected in ScaflFold Lake, Wisconsin, it 

 was so abundant as to color the entire lake, although ordinary 

 plankton catches failed to disclose the presence of the organism. 

 It was found that the gelatinous colonies dissociate within the net, 

 so that individuals or small clumps of cells only occur, these appear- 

 ing as bacteria. Repeated collections and laboratory culture per- 

 mitted the determination of the presence of Pelogloea bacillifera 

 together with Plectonema nostocorum. 



Nannoplankter; in semi-hard water lakes; often in tychoplankton 

 but usually found at great depths; sometimes occurring in a 

 stratum near the bottom of a lake. Mich., Wis. 



[561] 



