414 Mrs. G. C. Frankland and Dr. P. F. Frankland. [Mar. 8, 



Prestwich (J.), F.R.S. Geology : Chemical, Physical, and Strati- 

 graphical. Vol. II. 8vo. Oxford 1888. The Author. 



Sclater (P. L.), F.R.S. , and W. H. Hudson. Argentine Ornithology : 

 a Descriptive Catalogue of the Birds of the Argentine Republic. 

 Vol. 1. 8vo. London 1888. The Authors. 



March 8, 1888. 



Professor G. G. STOKES, D.C.L., President, in the Chair. 



The Presents received were laid on the table, and thanks ordered 

 for them. 



The following Papers were read : — 



I. " On some New and Typical Micro-organisms obtained from 

 Water and Soil." By Grace 0. Frankland and Percy F. 

 Frankland, Ph.D., B.Sc. (Lond.), F.C.S., F.I.C., Assoc. Roy. 

 Sch. of Mines. Communicated by Professor T. H. Huxley, 

 F.R.S. Received February 15, 1888. 



(Abstract.) 



In a previous communication,* the authors have given a detailed 

 description of a number of micro-organisms — -Bacilli and Micrococci 

 — which they had obtained in the course of investigations on the 

 distribution of micro-organisms in the atmosphere. The present 

 paper deals similarly with a number of typical and characteristic 

 micro-organisms which they have derived from various natural 

 waters. 



The authors refer to the forms which have been obtained from 

 water by previous observers, more especially to the " peach-coloured 

 bacterium," the " Gladothrix dichotoma" and the " Grenothrix hilhni- 

 ana^ as well as to others which have been more recently isolated by 

 means of the method of gelatine-plate cultivation. 



The authors point out the striking difference between the aerial 

 and aquatic micro-organisms, micrococci being the predominant 

 forms amongst the former, whilst bacillar forms are almost ex- 

 clusively present in water. In fact all the aquatic forms described 

 are bacilli. 



* " Studies on some New Micro-organisms obtained from Air," ' Phil. Trans.,' 

 B, vol. 178, p. 257. 



