CHAPTER XII. 



SYSTEMATIC AND DESCRIPTIVE. 



THE SchizomyceteSy Spaltpilze, or Fission- fungi have 

 already been described as divisible, according 1 to 

 Zopf, into four groups ; Coccacea, Bacteriacece, Lep- 

 totrichece, and Cladotrichec? . They comprise the 

 following- genera and species : 



GROUP I. COCCACE^E. 



Genus I. Streptococcus (Chain-cocci). Division in 

 one direction only. Individual cocci always or 

 occasionally remain -united together to form 

 chains. 



Genus II. Merismopedia (Plate-cocci). Division in 

 two directions, forming lamellae or plates. 



Genus III. Sarcina (Packet-cocci). Division in three 

 directions, forming colonies in cubes or packets. 



Genus IV. Micrococcus (Mass-cocci). Division in one 

 direction, cocci after division may remain aggre- 

 gated in irregular heaps, but never form chains. 



Genus V. Ascococcus (Pellicle-cocci). Like micro- 

 coccus, but the cocci grow in characteristic 

 gelatinous pellicles. 



