1900] A NEW CHROMOGENIC MICROCOCCUS 263 
and milk and on all ordinary solid media except potato. The 
cultural features are as follows :? 
Gelatine. —On a gelatine plate at 15°-20° C. it grows slowly. 
The colonies were visible on the third day and appeared under 
low power as small irregular dots, transparent, but with a slight, 
thin, uniform granulation. On the next day those that had 
emerged upon the surface had lost their irregularity and had 
become perfectly circular and slightly larger; otherwise to the 
eye they were unchanged, no pigment being visible. Under a 
higher power the granulation appeared more distinct, the col- 
onies seemed thicker and had a yellowish tinge in the center, 
and were thinner and more transparent at the edge. A few days 
later the surface colonies had taken on the characteristic sal- 
_ Mon tinge. Under the low power they looked perfectly homog- 
nous except for thinness at the periphery where the fine 
sranulation showed more distinctly. The edges were smooth 
and clearly defined. Later only a very slow increase in size 
took place, the colonies reaching a few millimeters in diameter 
i several weeks. 
— streak culture at 15°-20° C. showed growth o6 the 
the eg fp rwo delicate, finely wrinkled lines, one each side of 
On the a gag This was at first a pale creamy-pink in color. 
their a Pete lines were somewhat broader and had lost 
uent . wrinkled appearance, the lower parts being con 
salmon : gen Later the growth took on the true | 
the al There seemed to be almost no ee 2 
§towth, » €xcept possibly a slight sinking of the line 
— stab culture at room temperature showed a eae 
along the ome colony on the surface and a slight dere 
Daeg, Tack at the end of the third day. The ower 
Weeks lq ome drawing (fig. 1) being taken from a thr 
2 culture. The colony on the surface increases gradually 
viet heaneg indicated the media used were prepared in ge 
“ae January 2899, tions of the Bacteriological Committee. Jour. Amer. Pub. 
. 
