VI CONTENTS. 



X. A New P'ern from the Coal Measures : Tiihicaulis Sulcliffii 

 spec. nov. By Marie C. Stopes, D.Sc, Ph.D. Plates 



I— III. pp. 1—34 



(Issued separately. June zgth, /go6). 



XI. On the Difference between I'hysiological and Statistical Laws 



of Heredity. By A. D. Darbishire, M.A. ... pp. i — 44 



{Issued separately, July 6th, igo6). 



XII. Notes. — On an Ailotropic Form of Arsenic and On the Estima- 

 tion of Arsenic when in Minute Quantities. By William 

 Thomson, F.K.S.E., F.I. C. ... ... ... ... pp. i — 9 



{Issued separately, August 14th, /god). 



XIII. Notes on the Palsartic Species of Coal Tits. By Francis 



Nicholson, F.Z.S. With Coloured Plate pp. i — 21 



{Issued separately, Attgust ibth, IQ06). 



XIV. The Species of Ctenopteryx, a Genus of Dibrauchiale 



Cephalopoda. By Dr. J. II. Ashwortii and Dr. W. E. 

 rioYLE ... pp. I — 8 



{Issued separately, August 14th, igo6). 



PROCEEDINGS. 



Bailey, Charles, M.Sc, F.L.S. — Presentation to the Society's 

 Library of the Minutes of the meetings of the Manchester 

 Botanists' Association ... ... ... ... ... xiv 



Barnes, C. L., M.A. — Seaweed less highly esteemed amongst the 



ancients than the moderns ... ... ... ... ... vi 



E.xhibit of Mr. T. E. Heath's stereoscopic charts of the stars... ix 



Brothers, A., F. R.A.S. — Presentation to the Society of a portrait 



of the late Rev. William Gaskell ... ... ... ... vi 



Dl.XON, II. B., M.A., F.R.S. — Lantern exhibition of photographs 



taken in South Africa ... ... ... ... ... ... vi 



Faraday, F. J., F.L.S. — Foreshadowings of the conclusions of the 



Cancer Research Committee ... ... ... ... ... iii 



Morris-Airey, H., M.Sc. — On the variation of the electrical 



resistance of Osmium with temperature ... ... ... vii 



Nicholson, F., F.Z.S. — Presentation to the Society's Library of 

 Sturgeon's "Annals of Electricity, etc.," and "Annals of 

 Philosophical Discovery " ... ... ... ... ... xv 



