1 6 Synopsis of the Bacteria and Yeast Fungi. 



III. LEUCONOSTOC,Van Tieghem (Ann. Set. Nat., 



1873)- 



[Cells colourless, very minute, globose ; united in flexuose 

 and intertwined chains, which are enclosed in thick, lobed, 

 gelatinous sheaths. Sheaths aggregated into subglobose, 

 brain-like clusters, which present a pseudo-parenchymatous 

 internal structure. Spores isolated in the chains, globose, 

 terminal or intercalary. 



This genus is distinguished from Ascococcus, in addition to the 

 spores, by the fact that the families are not solid, each chaplet of cells 

 being separated from its neighbours by a thick layer of gelatine. Its 

 analogy to Nostoc is remarkable, the main difference being the want of 

 chlorophyll In fact, it bears the same resemblance to that genus that 

 Cohnia does to Clathrocystis.] 



[23. L. mesenterioides (Cienkowski), Van Tieghem. 

 Ascococcus mesenterioides, Cienkowski. 



Families collected in 

 large masses, which may 

 measure i i^- inch across 

 or more, polygonal by 

 mutual pressure. Cells in 

 long intertwined chains, 

 colourless, spherical, '8-1 '2 

 p. in diameter; each chain 

 surrounded by a thick 

 gelatinous sheath. Spores 

 spherical, with a thick 

 membrane, i '8-2 /t in dia- 

 meter. (Fig. 8.) 



Fig. 8. Leitconostoc mcsenterioides, X 520. _ 



a, section of a portion, showing the pseudo- <~>n DCet-rOOt SUgar, 



parenchymatous structure, and the inter- and the sacks vesse l s , 

 calary and terminal spores ; i-n, a spore, . 



and its development (after Van Tieghem). CtC., employed in the 



