OX 



THE STRUCTURE OF BACTERIA. 37 



of what is really meant, but it has had a soine= 

 what cramping influence upon the develop- 

 ment of bacteriological nomenclature, and its 

 disadvantages may still be frequently perceived. 

 The statements thus far made might well 

 lead to the conjecture that the genera hitherto 

 established fall short of expressing all the 

 known facts. It is clear, in fact, that all the 

 essays at classification made by F. Cohn, 

 J. Schroter, Zopf, De Bary, Hueppe, Migula 

 and A. Fischer have their defects ; but botan- 

 ists are almost unanimous in accepting the 

 essential features of the position taken by 

 Cohn, De Bary and Hueppe. Much would be 

 gained, therefore, if those physicians and 

 technical workers who have to do with bacteri- 

 ology would keep in mind the following table 

 of orientation which at least excludes gross 

 errors : 



I. Coccacea, producing in the vegetative state coccus 

 forms. 



1. Micrococcus, characterized by irregular disposi- 

 tion of the cells and cell-groups ; endospores 

 as yet unknown (Fig 8). 



2. Sarcina, forming tetrads and balelike packets of 

 cells ; endospores unquestionably observed (Fig. 



7). 



3. Streptococcus, forming spores ; arthrospores un- 

 questionably observed, endospores doubtful 

 (Fig. 4). 



