44 Synopsis of the Bacteria and Yeast Fungi. 



only distinguished by the fact that the threads are pointed 



at both ends. (Fig. 40.) 



In the blood of persons 

 suffering from febris recur rens, 

 and probably the cause of the 

 disease. 



The threads of S. Obermeieri 'are 

 either extended in a straight line, 

 and wound in regular spirals, or 

 else they bend themselves, moving 

 with extreme rapidity in the most 

 varied fashion, so that the spirals 

 appear of unequal size, especially 

 at the most strongly bent places. 

 This species is found in the blood 

 of those suffering from intermittent 

 fever, and in fact only during the 

 recurring fever periods, or for a 

 short time thereafter. In the in- 

 tervals of freedom from fever they 

 disappear. 



[It is a question whether this be not the same as the preceding 

 species, merely transpknted into a different habitat. TR.] 



Fig. tp.Spirochatta Obermeieri (c, 

 after a photograph by Koch ; d, after 

 Weigert). In d the blood corpuscles 

 are represented ; the bent threads 

 show the form assumed shortly before 

 the cessation of the fever. 



63. S. Cohnii, Winter ("Pilze," i. p. 61, 1884). 

 \_Spiroch(Kte denticola, Arndt.] 

 [S. dentium, Miller.] 



Very similar to both the foregoing species, but always 

 shorter, and for the most part more 

 slender, than S. Obermeieri, and besides, 

 like that, pointed at both ends. (Fig. 41.) 

 In the slime of the teeth ; discovered 

 by Cohn ; figured by Koch (" Beitrage 

 zur Biologic," vol. ii. pt. 3, pi. xiv. fig. 8). 

 [Miller has shown that this is articulated, 

 like S. plicatilis.] 



^ _~ 

 / V 



Fig. 41. Spirochata. 

 Cohnii (after Koch). 



