208 RELATIONSHIPS OF THE COCCACE^ 



recorded more than two or three times, with specific 

 names, it seems simpler to consider them as variants of 

 the commoner types to which they are respectively allied. 

 Motility, according to this view, is a property which may 

 be developed, under exceptional conditions, in any group 

 of the cocci, altho its manifestation is extremely rare. 



Besides these more or less clearly described forms there 

 are a few published descriptions of cocci which their ob- 

 servers failed to cultivate on artificial media, which may 

 be considered as perhaps incompletely characterized 

 albococci. The descriptions of M. Beigelii (Rabenhorst) , 

 Migula; M. cuniculorum (Schroter), Migula; M. decal- 

 vans (Thin), Schroter; M. dendroporthos, Ludwig; M. 

 hyalinus (Ehrenberg), Migula; M. imperatoris, Roze; 

 M. nuclei, Roze; and M. progrediens, Schroter, are of 

 this indefinite sort. 



