510 GENERAL SYSTEMATIC BACTERIOLOGY 



Buchanan (1918, p. 466) included this as the second genus of the 

 tribe Thiocapseae with the description: 



Cells spherical-ellipsoidal, relatively large (7 to 8/x) light violet in color, bound 

 into loose families by a colorless gelatin. Capable of swarming. Sulphur inclu- 

 sions relatively abundant. 



The type species is Thiosphaera gelatinosa Miyoshi. 



Bergey et al. (1923, p. 396) followed Buchanan. 



Thiosphaerion. A genus of sulphur bacteria named by Miyoshi 

 (1897, p. 170) for the species Thiosphaerion violaceum. The descrip- 

 tion given by Migula is: "Zellen spharo-ellipsoidisch, ca. 2.5 und 1.8 

 grosz, violett gefarbt, mit winzigen Schwefeleinschlussen, durch eine 

 gallertartige Substanz zu soliden rundlichen Familien verbunden. 

 Schwarmf ahig. " 



Migula calls it Lamprocystis violacea (Miyoshi) Mig. and says: 



Ich halte diese wie die 3 folgenden Arten nicht fur so verschieden von Lam- 

 procystis roseo-persicina. 



An Faden von Thiothrix nivea. 



The genus is not accepted by E. F. Smith (1905, p. 174). 

 Buchanan includes this as the third genus of Thiocapseae with the 

 following description: 



Cells spherical-ellipsoidal, small (.1.8 to 2.5ju) violet in color, with delicate sul- 

 phur inclusions. United by means of gelatin into solid spherical families. Cap- 

 able of swarming. 



The type species is Thiosphaerion violaceum Miyoshi. 



Bergey et al. (1923, p. 396) followed Buchanan. 

 Thiospira. A generic name proposed by Wislouch (1914, p. 50). 

 Enlows summarizes the description as follows: 



Motile, colorless, slightly curved sulfur spirilla with pointed ends. Sulfur 

 granules present. A few polar flagella. T . winogradskii (Om^lisinski) . A giant 

 sulfur spirillum 3.5/x by 50/i. T. bipunctata (Molisch). Small, very delicately 

 curved sulfur spirilla 1.7 to 2.4/i by 6.6 to 14^ long. 



Bergey (1923, p. 411) includes this genus as the third in the family 

 Achromatiaceae with the description: "Colorless, motile, slightly bent, 

 somewhat pointed at the ends, with drops of sulphur within the cells 

 and a small number of flagella at the ends." 



The type species may be designated as Thiospira Winogradskyi 

 Wislouch. 



