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XI. Studies on some New Micro-organisms obtained from Air. 
By Grace C. Frankland and Percy F. Frankland, Ph.D., B.Sc. (Bond.), 
F.C.S., F.I.C., Assoc. Roy. Sell, of Mines. 
Communicated by E. Pay Lankester, M.A., F.R.S., Professor of Zoology, University 
College, London. 
Received February 15,—Read March 3, 1887. 
[Plates 17-20.] 
Contents. 
PAGE 
Introduction . ........ 258 
Methods of Study and Examination ... 259 
List of Micrococci...... 263 
Micrococcus carnicolor........ 263 
„ albus... 264 
Streptococcus liquefaciens ......... 264 
Sarcina lutea ......... 265 
„ aurantiaca ......... 266 
,, liquefaciens......... 267 
Distinctions between Sarcinse described ..... 268 
Micrococcus gigas. ...... 268 
„ chryseus ..... 268 
„ rosaceus ..... . 269 
„ candicans ...... 270 
List of Bacilli ...... 270 
Bacillus aurescens........ 271 
„ aureus . ... 272 
„ citreus.. 272 
„ plicatus .......... 273 
„ chlorinus......... 274 
,, polymorphus.... .. 275 
,, profusus....... 276 
„ pestifer ..... 277 
„ leevis. .. 278 
,, cereus ....... 279 
„ subtilis (Hay bacillus) ..... 281 
Distinctions between B. lsevis, cereus, and subtilis. 283 
Bacillus (Micrococcus) prodigiosus ... <•..... ..... 284 
Saccharomyces ... 285 
,, liquefaciens...... 285 
„ rosaceus. ... . 286 
Mould producing a brown pigment .... 286 
MDCCCLXXXVII.—B. 2 L 11.10.87 
