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BIOLOGICAL STUDIES OX THE BACTERIA OF THE MOUTH. 73
tered or in small groups, and thick l)acilli, distinctly colored blue
violet. These two,kinds, wliicli I have entitled Jodocoecus vagi-
natus, and Bacillus buccal is
Fig. 20.
maximus, I shall now de- /
scribe more at length. Other
mouth-bacteria with a simi-
lar reaction are mentionei
below.
— . ii
\.f
BacHlas buccaVs maximus
appears in the shape of iso-
lated bacilli or threads, but
much often er as tufts of
threads, parallel to or cross-
ing each other, from 30 to
150/i long, and distinctly ar-
ticulated (Fig. 20). The rods
are from 2 to 10/^ long, some- FAsnri,E OF Bacillus buccalis maximus.
Colored with the iodine solution. 4i)0 : 1.
times even longer, and from
1 to 1.3y broad. This bacterium is therefore the larg-est occurrino;
Fig. 21.
/):^
Bacillus bdccalis maximus
After treatment with iodine solution. 1800:1.
in the mouth; it has a very regular contour, and usually the
same thickness throughout, {b, Fig. 21, is an exception.)
