246 RELATIONSHIPS OF THE COCCACEjE 



as to nitrate reduction are almost universally lacking. Of 

 the forms examined by Dyar, M. cinnabareus (Flugge) 

 reduced only slightly in twenty-eight days, Merismopedia 

 fragilis failed to reduce, and M. roseus sometimes reduced 

 quite actively. The following names are certainly to 

 be referred to the genus Rhodococcus, but whether to 

 R. roseus or R. fulvus is uncertain: 



A. Forms in which neither packet formation nor 

 liquefaction is recorded. M. bicolor, Kern; M. carneus, 

 Zimmermann; M. cerasinus (Heim), Migula; M. cinna- 

 bareus, Flugge ; M. cinnabarinus, Zimmermann ; M. coccin- 

 eus, Migula; M.Dantecii, Chester; M. KeJ 'ersteinii, Chester; 

 M. lactericeuSy Freund; M. rhodochrous, Zopf ; M. rubellus, 

 Migula; M. rubescens, Migula; M. sarcinoides, Migula. 



B. Forms in which slow liquefaction has been recorded 

 but packet formation has not. M. carnicolor, Frankland; 

 M. coralinus, Catani; M. cumulatus, Kern; M. fragilis 

 (Dyar), Migula; M. persicus, Kern; M. rosaceus, Frank- 

 land; M. roseo-persicinus, Migula; M. rubens, Migula; 

 M. rubiginosus, Kern; M. subcarneus (Kern), Migula; M. 

 sublilacinuSy Migula; M. subroseus, Migula. 



C. Forms in which packet formation and slow gelatin 

 liquefaction are recorded. S. erythrotnyxa (Overbeck), 

 Chester; S. rosacea (Lindner), Migula; S. rosea , Lindner; 

 S. rubra, Menge. 



D. Forms in which packets have been observed but not 

 liquefaction of gelatin. S. carnea, Gruber; S. incarnata, 

 Gruber; 5. persicina, Gruber. 



