MORPHOLOGY. 21 
When in a culture the cocci are for the most part associated in 
pairs (Fig. 1, d), we speak of the organism as a dzplococcus. 
The staphylococci are characterized by the fact that, for the most 
part, the individual cocci in a culture are solitary (Fig. 1, b). But, 
inasmuch as multiplication occurs by binary division, we also have 
pairs and occasionally a group of four—probably from the accidental 
apposition of two pairs (Fig. 1, c); or they may be associated in grape- 
Fig. 1, 
like bunches; and after staining and mounting a preparation we find 
the cells associated in irregular groups. This results from the fact 
that they are surrounded by a glutinous material which causes them 
to adhere to each other (Fig. 1, e). A mass of cocci held together in 
Fig. 3. Fie. 4, 
this way by a transparent, glutinous, intercellular substance is spoken 
of asa zodglea (Fig. 2). In the genus -Ascococcus the intercellar 
substance is quite firm and the zodgloea are in the form of spherical 
or irregularly lobulated masses surrounded by a resistant envelope of 
jelly-like material (Fig. 3). 
When, as a result of division in one direction only, the cocci 
