THE CLASSIFICATION OF BACTERIA ^i 



36. Str. mesentefioides (Cienkowski) Migula 



Ascococcus mesenterioides Cienkowski ; Arbeit, d. Nalurforsch. Gesellsch. Univ. 



Charkow, XII, 1878, 

 Leuconostoc mesenterioides Van Tieghem: Ann. Sci. Nat., 1878. 

 Str. mesenterioides Migula : Engler-Prantl. Natiirlichen Pflanzenfam., 1895. 



Morphology. In media free from glucose or cane sugar, like Str. pyogenes. 



In saccharine media, as thick white gelatinous clumps, containing chains. 



In the latter gas production and acid. 

 Milk. Coagulated. 

 Habitat. Causes a frog-spawn alteration of saccharine solutions. 



MICROCOCCUS 



Monas Ehrenberg: Die Infusionstierchen als volkommene Organismen, 1838. 

 Mikrokokkus Hallier, 1866-68. 



Micrococcus Cohn : Ueber Bacterien, Beitrage zurBiol. der Pfl., I, 2, 1872, 127. 

 Ascococcus Billroth : Untersuch. iiber die Vegetationsformen von Coccobacteria 



septica, 1874. 

 Bacteridium Schroter: Die Pilze, in Kryptogamenflora von Schlesien, 1886. 

 Lampropedia Schroter : 1. c. 

 Hyalococcus ^<^x'6t^\ : I.e. 

 Leucocystis Schroter : 1. c, 



Cells round ; occur singly, in twos, threes, tetrads, and in irregular groups. 

 Division in two directions of space. Non-motile. Spores absent, at least 

 never certainly demonstrated. 



SYNOPSIS OF THE GENUS 



I. Aerobic and facultative anaerobic. 



A. Without pigment on gelatin or agar. 



1. Do not grow on ordinary culture media, or, at best, but very poorly. 



Class I, p. 72. 



2. Grow on ordinary culture media. 



a. Grow best at body temperatures, and not at 20° C. 



Class II, p. 73. 



b. Grow at ordinary room temperatures, 20° C. 



♦ Gelatin liquefied. Class III, p. 74. 

 ** Gelatin not liquefied. Class IV, p. 82. 



