

TRANSACTIONS 



OF THE 



ROYAL SOCIETY OF EDINBURGH. 



VOLUME L, PART IV.— SESSION 1913-14. 



CONTENTS. 



PAGE 



XIX. Temperature Observations in Loch Earn. Part II. By E. M. Weddebburn, D.Sc., and 



A. W. Young, M.A., B.Sc, . . . . . . . .741 



{Issued April 13, 1915.; 



XX. On Hxmonais laurentii, n. sp., a Representative of a little-known Genus of Naididec. By 

 -I. Stephenson, D.Sc, Professor of Zoology, Government College, Lahore. (Plate 

 LXXIX), 769 



(Issued May 11, 1915.) 



XXI. On a Rule of Proportion observed in the Setse of certain Naididee. By J. Stephenson, 



M.B., D.Sc., Professor of Zoology, Government College, Lahore, . . . 783 



(Issued May 11, 1915.) 



XXII. On the Sexual Phase in certain of the Naididse, I. The Anatomy of Sexual Individuals of 

 the Genus Dero ; with Remarks on Hmmonais. II. The Genital Organs in the Genus 

 Slavina. By J. Stephenson, D.Sc., Professor of Zoology, Government College, 

 Lahore. (Plate LXXX), ........ 789 



(Issued May 11, 1915.) 



XXIII. Geological Observations in South Georgia. By D. Ferguson, Mem. Inst. M.E., F.R.G.S. 



Communicated by Professor J. W. Gregoby, D.Sc, F.R.S. (Plates LXXXI-XCI), . 797 



(Issued May 20, 1915.) 



XXIV. The Geological Relations and, Some Fossils of South Georgia. By J. W. Gregoby, D.Sc, 



F.R.S. (Plates XCII-XCI II), . . . . . . .817 



(Issued May 20, 1915.) 



XXV. The Petrology of South Georgia. By G. W. Tybbell, A.R.C.Sc., F.G.S., Lecturer in 



Mineralogy and Petrology, University of Glasgow. (Plate XCIV), . . . 823 



(Issued May 20, 1915.) 



XXVI. The Anatomy and Affinity of Deparia Moorei, Hook. By John M'Lean Thompson, M.A., 



B.Sc, Glasgow University. Communicated by Professor Boweb. (Plates XCV-XCVII) 837 



(Issued May 22, 1915.) 



XXVII. Morphology and Mathematics. By D'Abcy Wentwobth Thompson, . . . 857 



(Issued June 22, 1915.) 



XXVIII. The Poisoned Arrows of the Abors and Mishmis of North-East India, and the Composition 

 and Action of their Poisons. By Sir Thomas R. Fraser, M.D., F.R.S. , Professor of 

 Materia Medica and Therapeutics in the University of Edinburgh. (Plates XCV1II-C), 897 



(Issued August 24„ 1915.) 

 Index ............ 931 



EDINBURGH: 



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