110 BACTERIOLOGY 



B. Gelatin colonies microscopically rather coarsely granular ; form beau- 



tiful regular packets. 

 i. Potato cultures at first dark gray, later yellowish brown. 



7. Sarc. lutescens StubennUh. 



2. Potato cultures remain grayish yellow. 



8. Sarc. equi Stubenrath. 



C. Gelatin colonies very coarsely granular. Form very beautiful, regular 



packets. Potato cultures from the start citron-yellow. 



9. Sarc. lutea Fliigge. 



III. On agar and gelatin the growth is orange-yellow. 



10. Sarc. aurantiaca Fliigge. 



IV. On agar and gelatin the growth is brownish brownish yellow. 



A. Agar slant cultures smooth ; pure brown. 



11. Sarc. cervina Stubenrath. 



B. Agar slant cultures rugose, corrugated, yellowish brown, translucent. 



12. Sarc. fusca G ruber. 



V. On gelatin and agar the growth is red. 



A. Gelatin and agar stab cultures rose-red. Sarcina forms observed only 



in hay infusions. 



13. Sarc. rosea Schrbter. 



B. Gelatin and agar slant cultures, bright red. Sarcina forms observed 



only in hay infusions. 



14. Sarc. erythromyxa (Overbeck). 



1. Sarc. pulmonum (Hauser) 



Deutsche Archiv klin. Med., XLII, 1887. 



Morphology. Cocci on different media as small, and not very regular packets. 

 Grow slowly, even at body temperatures. 



Gelatin colonies. Deep: round, gray, opaque. Surface: small, round, puncti- 

 form, yellowish white ; microscopically, round, entire, gray, opaque, be- 

 coming sunken in 2-3 weeks ; central colony lacerate. 



Gelatin stab. In depth, the growth is uniform, beaded, gray yellowish gray ; 

 on the surface, in 20 days, growth 2-3 mm., gray, roundish, lacerate, 

 soft, glistening, becoming sunken. 



Agar colonies. Deep: round, dark, granular. Surface: like gelatin colonies, 

 but whiter; microscopically, round, bright dark gray, granular. 



Agar slant. Growth limited, mealy, gray-white, translucent ; border undulate. 



Bouillon. Clear, granular sediment. 



Milk. Not coagulated. 



