94 Proceedings of the Royal Society 
liquid and its vapour in thermal equilibrium, may be a very large 
quantity. 
3. Note on Ectocarpus. By John Battray, B.Sc. Com- 
municated by John Murray, Esq. 
4. Some remarkable Concretions, collected in the neighbour- 
hood of Philadelphia by the Rev. J. M. Macdonald, 
were exhibited. 
PRIVATE BUSINESS. 
The following Candidates were balloted for, and declared duly 
elected Fellows of the Society: — Professor W. R. Hodgkinson ; 
Mr Hugh Robert Mill, B.Sc. ; Mr John Rattray, M.A., B.Sc.; Mr 
William Miller, S.S.C.; Dr Alfred Daniell, M.A. ; and Captain W. 
de Wiveleslie Abney, F.R.S. 
Monday, 1 6th February 1885. 
JOHN MURRAY, Esq., PhD., Vice-President, 
in the Chair. 
The following Communications were read 
1. Preliminary Report on the Cephalopoda collected during 
the Cruise of H.M.S. “ Challenger.” Part I. The Octo- 
poda. By William E. Hoyle, M.A. (Oxon.), M.R.C.S. 
(. Published by permission of the Lords Commissioners of the 
Treasury.) 
The collection of Cephalopoda made by H.M.S. “ Challenger,” 
though not extensive, is of great interest, not only because a con- 
siderable number of new species were discovered, but also because 
several rare forms were found in fresh localities, and because a few 
