52 Synopsis of the Bacteria and Yeast Fungi. 



74. S, violaceum, Warming {I.e., Resumd, p. 5). 



,;; Cells either crescent-shaped (and so 



""'' without a complete turn) or with i or \\ 



spiral, broadly rounded at the ends, with 

 a flagellum at each. Cell-contents violet, 

 with a few sulphur granules. Height of the 

 spiral 8-10 fx., diameter i-i'S /«., thickness 

 YKz-s^.— spirillum of the cells 3-4 /A. (Fig. 52.) 



violaceum^ X 660 t 1 i • 1 



(after Warming). IH Mackish water. 



75. S. Rosenbergii, Warming {I.e., Resum^, p. ii). 



Cells with I or ij turn, 4-12 fx long, 

 I -5-2 '6 /* thick, colourless, but with ex- 

 tremely numerous strongly refringent sul- 

 phur granules. Spirals 6-7-5 /* high, of 

 very varied diameter, which amounts at 

 the most to half of the height. Moving 

 actively and in the most varied fashion, 



F'g- S3-— spirillum •' i / • 



Rosenbergii, X 660 but, as it secms, without flagella. (Fig. 



(after Wanning). C'i\ 



In brackish water. 



76. S. attenuatum, Warming (I.e., Resumd, p. 25). 



Cells strongly attenuated at the ends, usually with 3 



spirals. The middle 

 spiral is large and close 

 (height ^bout 11 /t, dia- 

 meter 6 fi), the end spirals 

 Fig- n.—sfiriUum attenuatum, y. 66a are elongated (lo /x, high, 

 (after Warming). 2 /.t in diameter). Thick- 



ness of the cells 2 or i-z ju,. (Fig. 54.) 

 In sea-water. 



