252 RELATIONSHIPS OF THE COCCACE/E 



Genus II. Ascococcus (Cohn) Winslow and Rogers. 

 Saprophytic, growing vigorously in saccharine solu- 

 tions. Cells in pairs, or in chains of paired elements. In 

 presence of certain carbohydrates large, lobed gelatinous 

 masses of zooglea formed. Fermentative powers high, 

 acid being produced in dextrose, lactose, and saccharose. 



Species i. Asc. mesenteroides Cienkowski. 

 A coccus occurring commonly in pairs, or chains of 

 paired elements. On media not containing sugar, pro- 

 duces faint translucent colonies; on media containing 

 saccharose, forms large, lobed masses of zooglea. Pro- 

 duces acid in dextrose, lactose, saccharose, and dextrin. 

 Develops best between 30 and 37 degrees. In zooglea 

 stage highly resistant to dry heat. 



Genus III. Streptococcus (Billroth) Winslow and Rogers. 



Parasites. Cells normally in short or long chains 

 (under unfavorable cultural conditions, sometimes in pairs 

 and small groups, never in large packets). Generally 

 stain by Gram. On agar streak, effused translucent 

 growth, often with isolated colonies. In stab culture, little 

 surface growth. Sugars fermented with formation of 

 large amount of acid. Generally fail to liquefy gelatin or 

 reduce nitrates. 



Species i. Str. equinus Andrewes and Horder. 

 This type of streptococcus appears to be characteristic 

 of the intestine of the herbivora. It is abundant in horse 



