170 IMPORTANT VARIETIES OF FISSION-FUNGI. 



ish colonies, even-bordered, extremely delicately punctate, 

 at the periphery partially transparent, becoming opaque, 

 and yellowish-gray to black toward the center. Deep: 

 Roundish to whetstone-shaped, opaque, even-bordered, 

 dark (9, vi). 



Gelatin Stab. — Thread-like, granular, white. Surface 

 growth : Wavy smooth border, somewhat elevated, shining 

 like porcelain, later somewhat dull, white, with consist- 

 ency of butter (9, iv). 



Agar Plates. — The colonies, when of the natural size 

 or magnified sixty times, are like those in gelatin plates, 

 except that they are somewhat more elevated and more 

 opaque. 



Agar Streak. — Slightly spreading, white, oily-looking 

 growth, with a wavy, smooth border, and moderately 

 elevated. Water of condensation clear. White precipi- 

 tate (9, i). 



Bouillon Culture. — Extremely cloudy with moderate 

 sediment; with some forms the bouillon remains clear, 

 and there is formed a pellicle and sediment of greater 

 coherence. 



Milk Culture. — Not coagulated in fourteen days, but it 

 becomes very feebly acid. 



Potato Culture. — Thick, white, porcelain-like growth, 

 with an oily luster, much elevated, with a wavy border. 

 In time the neighborhood of the growth is discolored gray. 

 The growth of the same cultures upon old potatoes (March) 

 is much drier and more crumbly (9, vn). 



Chemical Activities. — Does not liquefy gelatin, forms 

 no gas upon nutrient media containing sugar, and no indol 

 nor H 2 S. 



Distribution. — (a) Outside the body : Very common in 

 air, water, milk; everywhere in Germany where it has 

 been looked for. 



(b) In organism: Only epiphytic, for example, in pre- 

 putial smegma and human hairs. 



Forms: We have isolated a Micr. candicans, which 

 differs only from the stock variety in liquefying gelatin 

 feebly. 



Related Varieties. — The Staphylococcus cereus albus Posset only 

 differs from this variety in the smaller size of the individuals (perhaps 



