ON SOME NEW MICRO-ORGANISMS OBTAINED FROM AIR. 
263 
Iu our terminology we have, following the practice of many recent writers, 
abandoned the term bacterium, distinguishing those forms which are distinctly 
elongated as bacilli, and those which are spherical, or approximately so, as micrococci. 
I.—MICROCOCCI. 
The following different varieties of micrococci have been found and examined by 
us :— 
1. Micrococcus carnicolor. 
2. M. albus. 
3. Streptococcus liquefaciens. 
4. Sarcina lutea. 
5. S. aurantiaca. 
6. S. liquefaciens. 
7. M, gigas. 
8. M. chryseus. 
9. M. rosaceus. 
10. M. candicans. 
1 . Micrococcus Carnicolor. 
Occurrence. —This micrococcus was obtained as a pinkish surface-expansion on a 
gelatine-dish exposed to the air of the Close at the base of Norwich Cathedral, 26th 
April, 1886. 
Microscopic appearance. —Under the high power (x 1,000) it is seen to consist of 
almost round cocci varying in size from - 5/x to about 1 T>/x. The larger forms almost 
invariably exhibit a division (see Plate 17, fig. 2, No. 2c). Otherwise the cocci 
present no definite arrangement. 
When viewed in drop-cultivations, they exhibit the usual vibratory motion of 
micrococci. 
Appearance in Cultivations. 
Gelatine.—-In tube after four days (August 6 —10, 1886) the needle-track in the 
depth exhibits but very slight growth ; over the surface, however, there is a pink expan¬ 
sion extending laterally on either side of the streak of the needle. At a later period 
the needle-track beneath the surface becomes beaded, and the colour of the surface- 
growth is seen to be of a lighter tint in the centre than round the periphery. (See 
Plate 17, No. 2b.) 
In very old cultivations the gelatine becomes slightly liquefied. 
Agar-agar. —Grows rapidly, producing a smooth flesh-coloured surface-expansion 
having a glazed appearance, (See Plate 17, No. 2a.) 
Broth. —After nine days (August 7—-16, 1886) the liquid is clear, free from a 
pellicle, and has a pinkish deposit at the bottom. 
