42 MICRO-ORGANISMS AND DISEASE. [CHAP. 



Clathrocystis roseo-persicina (Cohn), peach-coloured bac- 

 terium, Bact. rubescens (Lankester), is an organism of about 

 0'0025 mm. in diameter, spherical or oval and of a bright red 

 colour. The cells differ from micrococcus prodigiosus, not 

 only in their greater size and their intrinsic colour, but also in 

 this that having formed zooglcea-masses there are gradually 

 developed cavities or cysts therein, which are filled with 

 water, while the coloured cells occupy their periphery. The 

 cysts ultimately break up. Together with this organism occur 

 other pink-coloured organisms described by Cohn as monades. 

 Monas vinosa, spherical cells about 0'002 0'003 mm. in 



diameter. 

 Monas Okenii, cylindrical cells, O'OOS 0'005 mm. long, 



0'005 mm. broad, flagellate. 

 Rhabdomonas rosea, spindle-shaped, 0'004 mm. broad, 



0-020-03 mm. long, flagellate. 



Monas Warmingii, spindle-shaped, O'OOS mm. broad, 

 0-0150.020 mm. long, flagellate. 



Aseoc.occus Billroth first described certain peculiar spheri- 

 cal, oval, or knobbed masses of minute micrococci, which he 



FlG. 14. ASCOCOCCUS BlLLBOTHI, (AFTER COHN). 



found in putrid meat infusion. Each of the masses is enveloped 

 in a resistant firm hyaline capsule of about O'OIO to 0'015 mm. 

 thickness. The masses are of various sizes, from 0*02 to 07 



