'42 BACTERIOLOGY. 



of long chains of 4, 8, and 12 individuals. (See Fig. 

 1, b). 



The sarcinse divide more or less regularly in three 

 directions of space, but instead of becoming separated 

 the one from the other as single cells, the tendency is 

 for the segmentation to be incomplete ; the cells remain- 

 ing together in masses. The indentations upon these 

 masses or cubes which indicate the point of incomplete 

 fission give to these bundles of cells the appearance 

 commonly ascribed to them — that of a bale of cotton 

 or a packet of rags (See Fig. 1, e.) 



The multiplication of bacilli is in the main similar 

 to that given for the micrococci. A dividing cell will 

 elongate slightly in the direction of its long axis ; an 

 indentation will appear about midway between its poles, 

 and will become deeper and deeper until eventually two 

 daughter cells will be formed. This process may occur 

 in such a way that the two young bacilli will adhere 

 together by their adjacent ends in much the same way 

 that sausages are seen to be held together in strings 

 (Fig. 2, /), or the segmentation may take place more at 

 right angles to the long axis, so that the proximal ends 

 of the young cells are flattened while the distal extremi- 

 ties may be rounded or slightly pointed (Fig. 2, e). 

 The segmentation of the anthrax bacillus, with which 

 we are subsequently to become acquainted, results, when 

 completed, in an indentation of the adjacent extrem- 

 ities of the young segments, so that by the aid of 

 high magnifying powers these surfaces are seen to be 

 actually concave. (See Fig. 76.) Bacilli never divide 

 longitudinally. 



With the spore-forming bacilli, under favorable con- 

 ditions of nutrition and temperature, the same is seen 



