1054 



MANUAL OF DETERMINATIVE BACTERIOLOGY 



(Cent. f. Bakt., I Abt., Orig., 96, 1925, 

 426.) From sea water. 



Spirochaeta minima Dobell. (Dobell, 

 Arch. f. Protistenk., 26, 1912, 117; not 

 Spirochaeta viinima Pettit, Contribution 

 a I'Etude des Spirochetides, Vanves, II, 

 1928, 187 {Treponema minimum Beaure- 

 paire-Araguoand Vianna, Mem. Inst. Os- 

 waldo Cruz, 5, 1913, 211).) One of the 

 smallest known Spirochaeta, 0.5 by 2.0 to 

 2.5 microns. From water of the river 

 Granta at Cambridge. Similar to Spiro- 

 chaeta fulcjurans. 



Spirochaeta vivax (Dobell ) Zuelzer. 

 {Treponema vivax Dobell, Arch. f. Pro- 

 tistenk., 26, 1912, 117; Zuelzer, 1925, in 

 Prowazek, Handb. d. path. Protoz., S, 



1931, 1669.) From fresh water of the 

 river Granta at Cambridge. 



Spirochaete kochii Trevisan. (Spiro- 

 chaete des Wollsteiner See, Koch, in 

 Cohn, Beilr. z. Biol. d. Pflanzen, 2, Heft 

 3, 1877, 420; Trevisan, Batter. Ital., 1879, 

 26; Spirillum kochii Trevisan, I generi e 

 le specie delle Batteriacee, 1889, 24.) 

 From water. 



Spirochaete schroeteri Cohn. (Jahres- 

 ber. d. Schles. Gesellch. f. 1883, 198; 

 quoted from Schroeter, in Cohn, Kryp- 

 tog. Flora v. Schlesien, 3, 1, 1889, 168; 

 Spirillum schroeteri Cohn, quoted from 

 DeToni and Trevisan, in Saccardo, Syl- 

 loge Fungorum, 8, 1889, 1007.) Similar to 

 Spirochaete cohnii. From cellar walls. 



Genus II. Saprospira Gross. 

 (Mittheil. Zool. Stat, zu Neapel, 30, 1911, 190.) 



Spiral protoplasm without evident axial filament. Spirals rather shallow. Trans- 

 verse markings or septa (?) seen in unstained and stained specimens. Periplast 

 membrane distinct. Motility active and rotating. Free-living in marine ooze. 



The type species is Saprospira grandis Gross. 



1. Saprospira grandis Gross. (Mit- 

 teil. Zool. Station zu Neapel, 20, 1911, 

 190.) From Latin, great. 



Cylindrical, 1.2 by SO microns in 

 length, with obtuse ends. 



Spiral amplitude is 24 microns. 



Waves large, inconstant, shallow, ir- 

 regular, 3 to 5 in number, sometimes al- 

 most straight. 



Axial filament absent. 



Cross-striations i)rcsent. 



Membrane distinct. 



Division transverse. 



Flexible, elastic. 



Crista absent. 



Terminal spiral filament absent. 



Highly motile end portion absent. 



Trypsin digestion. 



Source : Found in intestinal tract of the 

 oyster. 



Habitat : Free-living in foraminiferous 

 sand. 



2. Saprospira puncta Dimitroff. 



(Jour. Bact., 12, 1926, 146.) From Latin, 

 pitted. 



Large spirals : 1 .0 by 86 microns with 

 pointed ends. 



The spiral amplitude is 4 to 8 microns. 



The average number of turns is 3. 



Axial filament absent. 



Cross-striations present. 



Membrane distinct. 



Division transverse. 



Source : Found in oysters. 



3. Saprospira lepta Dimitroff. (Jour. 

 Bact., 12, 1926, 144.) From Latin, small. 



Large spirals : 0.5 by 70.0 microns, with 

 pointed ends. 



The spiral amplitude ranges from 5 to 

 13 microns. 



The spiral width varies from 1.6 to 4.8 

 microns. 



The average number of turns is 6. 



Axial filament absent . 



Cross-striations present. 



