Vol. 60: Part I, 



MEMOIRS AND PROCE 



THE MANCHESTB 

 LITERARY & PHILOSOPHICAL 



SOCIETY, 191S-1916. 



CONTENTS. 



Presidential Address : 

 Animal Symmetry and the Differentiation of Species. By the 

 President, Professor Sydney J. Hickson, M.A., D.Sc, 

 F.R.S. pp. 1-15. 



(Issued separately, Febiuary 12th, 191O.) 



Memoirs : 



I. The Relationship between the Geographical Distribution of 



Megalithic Monuments and Ancient Mines. By W. J. 

 Perry, B.A. And Remarks on Mr. W. J. Perry's Com- 

 munication. By Professor G. Elliot Smith, M.A., M.D., 

 F.R.S. With 3 Maps. - - - - - - - pp. I— 36. 



{Issued separately, November 24th, ig/J.) 



II. Notes on some Palaeozoic Fishes. By D. M. S. Watson, 



M.Sc, and Henry Day, M.Sc. With 3 Pis. and g Text -Jigs. pp. 1—52. 



{Issued separately, February Jt/i, igib.) 



III. A Change in the Habits of the Black-headed Gull. By T. A. 



Coward, F.Z.S., F.E.S. - - - - - - - pp. 1—6. 



{Issued separately, January 17th, iqi6. 



Proceedings -pp. i.— xxiv. 



MANCHESTER: 

 36, GEORGE STREET. 



Ip>ncc afive Sbillinc;?. 



