264 
MRS. G. C. FRANKLAND AND DR. P. F. FRANK LAND 
Appearance on plate-cultivation.- —-The colonies are seen to the naked eye to be of 
a faint pink colour. Under a low power (X100) they appear as almost perfectly 
circular smooth-edged colonies, the interior of which is exceedingly finely granular in 
its nature. They are brown in colour, the shade becoming deeper as the colonies 
develop further. (See Plate 17, No. 2d.) When the colonies reach the surface of 
the gelatine they form a very thin and round—almost colourless—expansion, which 
subsequently acquires the characteristic pink tint. Under a low power this expansion is 
seen to be finely granular, with an almost perfectly smooth edge. (See Plate 17, No. 2e.) 
Tubes were inoculated both from the surface-colonies and from those in the depth of 
the gelatine, and from each the same characteristic growth was obtained. 
This organism has many points of similarity with the Micrococcus rosaccus, from 
which it is chiefly distinguishable (1) by its more rapid growth, (2) by the fainter 
colour of the pigment, and (3) by the different appearance of its colonies. (See 
page 269.) 
2 . Micrococcus Albus. 
Occurrence. —We have obtained this as a white surface-expansion on a gelatine-dish 
from the same place as the Micrococcus carnicolor (p. 263). 
Microscopic appearance. —Viewed under a high power (x 1,000), this is seen to 
consist of cocci varying in size from ‘8/x to 1 *5/x, the larger ones presenting a division 
(see Plate 17, fig. 5, No. 5 b ); they have no characteristic arrangement. 
Appearance in Cultivations. 
Gelatine. —In tube after four days (August 6—10, 1886) the needle-track below 
the surface shows a faint saw-like growth, whilst on the surface there is a narrow, 
white, shining expansion spreading on either side of the needle-streak. The edge is 
lobular (see Plate 17, No. 5a) and smooth, not serrated. No liquefaction of the 
gelatine takes place. 
Agar-agar.- —It appears as a faintly white, almost colourless surface-expansion, with 
a smooth, but lobular, edge. 
Broth. —After nine days (August 7—16, 1886) the liquid is very slightly turbid, 
free from pellicle, with a yellowish-white deposit at the bottom. 
Appearance on plate-cultivation. —The colonies are visible to the naked eye as 
small milk-white discs. Under a low power (X 100) they are seen to be circular, 
sharp-edged, and finely granular in nature. In colour they exhibit varying shades of 
brown, according to the degree of their development. (See Plate 17, No. 5c.) 
3. Streptococcus Liquefaciens. 
Occurrence. —This was obtained from air as a yellow surface-expansion on a 
gelatine-dish. 
