178 IMPORTANT VARIETIES OF FISSION-FUNGI. 



Strept. liquefaciens Krai. One should ordinarily give the unambigu- 

 ous name of Zimmermann the preference over Micr. luteus, yet we 

 desired to indicate the analogy to the Sarc. lutea. 



Micrococcus flavus (Fliigge). Lehm. and Neum. 



Completely identical with the former, only it has finely granular 

 gelatin colonies and less tendency to the formation of tetrads. We 

 consider this form identical with the already described Sarc. flava, 

 with which it corresponds, with the exception of the ability to produce 

 sarcina packets. We have obtained this organism as Staphylococcus 

 citreus from C. Frankel and as Sarc. flava from Prague. The latter 

 was always without sarcina packets. We have been unable also to 

 differentiate what we obtained as Micr. citreus agilis Menge (C. B. 

 xn, 49). It is devoid of flagella, very weakly liquefying, and non- 

 motile. 



There appear to be transitions from the Micr. flavus to the Micr. 

 luteus. 



Micrococcus sulfureus Zimm., Elaborated by Lehm. 

 and Neum. 



We cover, provisionally, with this name all lemon-yellow as well as 

 greenish to grayish-yellow cocci, which do not liquefy gelatin, of 

 which we have cultivated many from the air and water. They were 

 all finely granular upon gelatin plates. We consider them as non- 

 liquefying forms of Micr. flavus L. and N. * Here also belongs the 

 Micr. sordidus Schroter. 



Micrococcus sulfureus ,3 tardigradus (Fliigge). 

 (Lehm. and Neum.) 



Microccocus flavus tardigradus (Fliigge), page 178. 



It is differentiated from the former only by very slow growth. 

 Found by Zimmermann in water. Only a variety of the former. Once 

 we found a Micr. sulfureus in the air whose superficial colonies pro- 

 duced sometimes no, sometimes very little, and again very active, 

 liquefaction, thus being a transition to the Micr. flavus. 



Micrococcus badius (Lehm. and Neum.). 



Medium-sized, round cocci, often united in tetrads, never showing 

 sarcina forms upon any nutrient medium. In the gelatin plate the 

 colonies appear as glue-brown, slightly elevated, transparent drops, 

 which when magnified sixty times appear entirely homogeneous or at 



1 We have never found coarsely granular, non-liquefying forms re- 

 sembling the Micr. luteus. 



