286 GENERAL SYSTEMATIC BACTERIOLOGY 



throughout their entire length. Occur singly or in little knots. Limited in its 

 invasion to the epithelial tissue. Bergonzini (Lo Spallanzani, An. 12, f. 10 

 Modena, 1884) places these species among the Schizomycetes. 



Cr3rptococcus. A genus of "algae" described by Kiitzing (1833, p. 

 374), later used as a genus of fungi, to which occasionally bacteria 

 have been referred, as Cryptococcus xanthogenicus Freiere. (See 

 Koch's Jahresber, 1, 346, 1885.) 



Cryptodesma. A genus of entophyte named by Leidy (1849, p. 

 250) with the following description: "Filaments ribbon-Uke, growing 

 from attached granular masses. Consisting of a single cell, with 

 a very dehcate cell wall, and minute granular contents." One species 

 C. tenuis was described from the ventri cuius of Passalus cornutus. 

 The specific description is as follows: 



Filaments hyaline, compressed, attenuated at both extremities, growing in 

 dense bunches from rounded granular masses. Cell wall very thin and delicate, 

 granular contents of cell very fine and indistinct, measuring from vG.h^a. to ^^Viy 

 inch with a few coarser granules, and occasionally a few globules, measuring 

 1^^ inch. Length of filaments ^itr to yV inch greatest breadth ifVff inch. 



Leidy (1851, p. 39) later questioned the ascription of name to this 

 organism, doubting the entophytic nature of the form. The name 

 is probably to be regarded as of doubtful vahdity. 



Cylindrogloea. A genus of bacteria described by Perfiliev (1914, 

 p. 223). Enlows (1920, p. 35) states: 



Type species (monotypy). C. bactifera. A bacterium living symbiotically 

 with Chlorochromatium aggregatum Lauterborn. A cylindrical, colorless zooglo- 

 «al mass, consisting of an axial filament formed by colorless cells, rectangular and 

 numbering 20 to 35, measuring 0.7 to 0.8/Lt by 2 to 4ju, separated by interstices and 

 surrounded by a mucilaginous envelope. In this outer mucilaginous zone the 

 green bacteria lie, which Perfiliev says react in the same manner as the green 

 form described by Lauterborn. The axial filament is not easily visible, because 

 of the overlying Chlorochromatium. 



Cystobacter. A genus of bacteria proposed by Schroeter (1886, 

 p. 170) to include two species, C. fuscus and C. erectus Schroeter. The 

 generic description reads: 



Zellen in Form kurzen, diinner Stabchen, in eine verbreitete Schleimmasse 

 eingebetten, spater in langeren Faden zusammenhangend. Die Schleimmasse 

 theilt sich in unregelmassige rundliche Klumpen, welche sich spater mit einer 

 festenhornatigen structurlosen Hiille umgeben. 



