544 R. E. BUCHANAN 



axis filament. Volutin granules regularly present in the plasma. 

 No differentiation of exterior. Cell circular in cross section. 

 The type species is Spirochaeta plicatilis Ehrenberg. 



Genus II. Saprospira Gross, 1911, p. 188 



Slender spiral cells living free in salt water, actively 7notile, 

 flexuous. Cross section circular. 



The type species is Saprospira grandis Gross. 



Genus III. Cristispira Gross, 1910, p. 41 



Spiral organisms known only from the crystalline style of mus- 

 sels. The body of the organism is circular in cross section, more 

 or less spirally wound and possessing a lorigitudinal comb or crest 

 which does not extend quite to the tips. 



The type species is Cristispira veneris Grcss. 



Genus IV. Treponema Schaudinn, 1905, p. 1728 



Synonyms : 



Spirochaeta of many authors 



Spirochaete of many authors 



Spironema Vuillemin, 1905, p. not Spironema Meek, 1864 



Microspironema Stiles & Pfender, December 2, 1905, p. 936 



Borrelia Swellengrebel, 1907, p. 582. 



Spiroschaudinnia Sambon, 1907, p. 833 

 Cells slender, spiral, not flattened, attenuated at tips, without 

 crest. Midtiplication by longitudinal or by cross division. Para- 

 sites" in warm blooded animals. Motile. 



The type species is Treponema pallidum Schaudinn. 



REFERENCES 



Berkeley, M. J. 1857 Introduction to Cryptogamic Botany. 

 Berkeley, M. J. 1874 Notes on North American Fungi Grevillea, 3, 64. 

 CoHN, Ferd. 1872 Untersuchungen uber Bakterien. Beitr. z. Biologie der 



Pflanzen. 1 (Heft. 1): 127-224. 

 DoBELL, C. Clifford 1911 On Cristispera veneris nov. sp. and the Affinities 



and Classification of Spirochaetes. Quart. J. Mic. So. 56, 507-540. 



