CONTENTS. vii 



NUMBER PAQK 



XVIII. The Lamellibranchs of the Silurian Rocks of Girvan. By Wheelton 



Hind, M.D., B.S., F.R.C.S., F.G.S. (With Five Plates), . . 479 



XIX. TJie Alcyonaria of the Cape of Good Hope and Natal. Alcyonacea. 



By J. Stuart Thomson, Ph.D., F.L.S. (With Four Plates), . 549 



XX. TJie Phase of , the Nucleus known as Synapsis. By A. Anstruther 

 Lawson, Ph.D., D.Sc, F.L.S. , F.R.S.E., Lecturer in Botany, 

 University of Glasgow. (With Two Plates), . . . .591 



XXL Observations on the Body Temperature of the Domestic Fowl ( Gallus 



gallus) during Incubation. By Sutherland Simpson, M.D., . 605 



PART IV. (1910-11.) 



XXII. The Temperature Seiche. Part I. — Temperature Observations in the 

 Madiisee, Pomerania. Part II. — Hydrodynamical Theory of 

 Temperature Oscillations in Lakes. Part III. — -Calculation of the 

 Period of the Temperature Seiche in the Madiisee. By E. M. 

 Wedderburn, W.S. Part IV. — Experimental Verification of the 

 Hydrodynamical Theory of Temperature Seiches. By E. M. 

 Wedderburn, W.S., and A. M. Williams, M.A., B.Sc. (With 

 One Plate), . . . . . . . .619 



XXIII. TJie Jurassic Flora of Sutherland. By A. C. Seward, F.R.S., 



Professor of Botany, Cambridge. (Plates I.-X. ; text-figures 1-14 ; 

 sketch-maps, and views of the coast), .... 643 



XXIV. On the Structure and Affinities of Diplolabis romeri (Solms). By 



W. T. Gordon, M.A., B.Sc, B.A., Falconer Fellow of Edinburgh 

 University, Lecturer in Palaeontology, Edinburgh University. 

 (With Four Plates), . . . . . .711 



XXV. Thermo- Electric Diagram from —200° C. to 100 c C, deduced from the 

 observations of Professors Dewar and Fleming. By J. D. Hamilton 

 Dickson, M.A., Peterhouse, Cambridge, .... 737 



XXVI. The Plant Remains in the Scottish Peat Mosses. Part IV. By 

 Francis J. Lewis, M.Sc, F.L.S., Lecturer in Geographical Botany, 

 University of Liverpool. (With Five Plates), . . . 793 



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