48 Synopsis of tJu Bacteria and Yeast Fungi. 



Fig. 46. a, Spirillum serpens ; b, the same, felted in a "swarm;" 

 c, S. tenue; d, S. Undula: e, S. volutans, X 650 (after Cohn). 



69. S. tenue, Ehrenberg (" Die Infusionsthierchen.," 

 p. 84). 



Cells very slender, 4-15 /. long, about 2-25 p. thick 

 (according to Ehrenberg), with at least 



I J J 1 i, usually, however, 2, 3, 4, or 5 spirals. 



I | ) ) I Height and diameter of the spirals about 

 1.54 fj., or the diameter amounts to half 

 the height Moving very swiftly, but also 

 often almost motionless and felted in 

 dense swarms or masses, or united in a 

 zoogloea. (Figs. 46^, 47.) 

 In various infusions. 



Fig. 47. Spirillum 



tenue, x 660 (after According to Warming, only I ft. thick, and the 

 Warming). spirals at times 8-10 /* high, with the diameter f - T ' 5 



of the height. There appears to be some confusion between S. tenue 



*nd 5. Undula. 



