MYCODERMA 



289 



C. neoformans 



C. flavescens 



C. Laurentii 

 C. luteolus 



C. uvae 



C. candidus 

 C. lipoferus 

 C. tninor 



b. Nitrates not utilized. 



I. Agar slant cultures mucoid. 



A. Cells round or slightly oval. 



B. Cells oval or elongated. 

 AA. Diameter more than half the length. 

 BB. Diameter less than half the length. 



AAA. Lactose utilized, alcohol not. 

 BBB. Alcohol utiHzed, lactose not. 

 II. Agar slant cultures not mucoid. 



A. Glucose only utiUzed. 



B. Other sugars also utiUzed. 

 AA. Cells round. 

 BB. Cells oval, very large. 

 CC. Cells oval, small. 



2. Glucose only fermented. 



a. Agar slant culture not mucoid. Red pigment in media containing traces of 

 jj.Qj^ C. pulcherrimus 



b. Agar slant cultures not mucoid; no red pigment. C. Molischianus 



3. Fermenting glucose and sucrose. 



a. Cells large. 



I. Nitrates utiUzed. C. utilis 



II. Nitrates not utihzed. C. dattilus 



b. Cells small. 



I. Pseudomycehum in wort; only peptone utihzed. 



A. Cells oval to elongated. C. bacillaris 



B. Cells round. 



AA. Asparagine and ammonium sulphate utilized. C. dactiliferus 

 BB. Asparagine and aimnonium sulphate not utilized. 



C. stellatus 



II. Cells-single or in twos; ammonium sulphate and asparagine also utilized. 



C. Gropeiigiesserii 



4. Fermenting glucose, galactose, and sucrose. 



5. Fermenting glucose, sucrose, and maltose. 



6. Fermenting glucose, sucrose, and lactose. 



7. Fermenting glucose, galactose, sucrose, and lactose. 



8. Fermenting glucose, galactose, sucrose, and maltose. 



a. Raflfinose not fermented. 



b. One third of raflfinose fermented. 



C. Holmii 

 C. colliculosus 

 C. kefyr 

 C. sphaericus 



C. californicus 

 C. fermentans 



Mycoderma. This is now usually accepted as the correct generic 

 name for asporogenous film-forming yeasts and should not be used 

 for acetic acid bacteria as it has been by some bacteriologists or for 

 yeast-like fungi which form arthrospores as it has been by Vuillcmin 

 and a few other mycologists. Mycoderma species form a heavy 

 pellicle and are oxidative rather than fermentive. They may be the 

 imperfect stages or asporogenous strains of Pichia, Hansenula, De- 

 baryomyces, and other sporogenous film-forming yeasts. Indeed, 

 Baltatu obtained thirteen cultures of Mycoderma from well-known 

 European culture museums and was able to induce sporulation in 



