Vll 



PAGE 



Croonian Lecture : Upon the Motion of the Mammalian Heart. By Thomas 



Lewis 560 



On the Influence of Vibrations upon the Forms of Certain Sponge-Spicules. By 

 Arthur Dendy, D.Sc., F.R.S., Professor of Zoology, and J. W. Nicholson, M.A., 

 D.Sc, F.R.S., Professor of Mathematics, in the University of London (King's 



College) 573 



OBITUARY NOTICES OF FELLOWS DECEASED. 



Sir "William Gowers i 



Richard Lydekker iii 



Sir John Murray, K.C.B vi 



David Douglas Cunningham xv 



Henry Charlton Bastian xxi 



Arthur Sheridan Lea xxv 



August Friedrich Leopold Weismann xxvii 



Sir William Turner, K.C.B xxxiv 



Edward Alfred Minchin xxxviii 



Sir Thomas Lauder Brunton (with portrait) xliv 



Hugo Kronecker (with portrait) xlix 



Elias Mecznikow li 



Harold Henry Welch Pearson lx 



Captain J. W. Jenkinson, M.A., D.Sc xlii 



Index 



Ixix 



