42 GEXER-Ui SYSTEMATIC BACTERIOLOGY 



cc. Rods ellipsoidal, straight, filaments never pseudospLral. 



Bacterium Ehr. 

 aa. Bacilli and cocci surrounded by a special membranous-gelatinous capsule. 



Tribe Klebsielleae Trev. 

 b. Bacilli straight or curved, never true spirals. 



Subtribe Euklebsielleae Trev. 



c. Capsvde repeatedly ramose Winogradskya Trev. 



cc. Capsule simple, never ramose. 



d. Plasma uniformly diffused. . . .Klebsiella Trev. 



dd. Plasma condensed at poles Dicoccia Trev. 



bb. Rods spirally twisted Subtribe Myconostoceae Trev. 



One genus only Myconostoc Cohn 



Anhang Cysiobacter. 



Key to Tribes and Genera of Subfamily Coccogenae 



a. Cocci associated in families in bladder-like gelatinous masses or cysts: 



Tribe Ascococceae Trev. 

 b. Cocci separated in mucus of the matrix. 



c. Cocci destitute of special cysts, in families in common cysts. 

 Subtribe Euascocceae 

 d. Cocci numerous, associated in large families: 

 e. Cysts homogeneous, not lamellose. 



f. Families at first solid, then irregularly clathrate. 

 Division at first in three directions, then in two 



directions Latnprocystis Sehroet. 



ff . Families in solid mass, cocci dividing in one direc- 

 tion Ascococcus Cohn 



ee. Cysts lamellose. Solid colonies. Cocci divide in three 



planes Bollingera Trev. 



dd. Cocci not numerous, associated in small families: 



e. Cysts many layered. Division in three directions. 



Leucocystis Sehroet. 

 ee. Cysts homogeneous, not lamellose: 



f. Cocci all in periphery. Cocci divide at first in 

 three directions in two. 



Cenomesia Trev. 

 ff. Cocci few and scattered. Divide in one direction. 



Thiothece Winogr. 

 fff. Cocci in solid families, cocci divide in three direc- 

 tions Thiocystis Winogr. 



"CO. Cocci borne in special cysts. Common cysts absent. 



Subtribe Gaffkyeae Trev. 

 d. Cysts broad, persistent, numerous in conglobate heap, 

 interior solid, densely aggregated. 



Chlamydatomus Trev. 

 dd. Cysts tenuous, at length breaking apart, solitary, never 

 associated in heaps Gaffkya Trev. 



