TRANSACTIONS 



OF THE 



ROYAL SOCIETY OF EDINBURGH. 



VOLUME LI, PART I.— SESSION 1914-15. 





CONTENTS. 



I. On the Zeolite* and Associated Minerals from the Tertiary Lavas around Ben More, Mull. By 

 W. F. P. M'Lintock, B.Sc, Royal Scottish Museum, Edinburgh. Communicated by J. S. Flett, 

 D.Sc., LL.D., F.R.S. (Plates I-III), ........ 1 



{Issued September 23, 1915.) 



II. Sponyiaires recueillis par la " Scotia" dans V Antarctique (1903 -190 J/.). Supplement. Par Emile 



Topsent, Professeur a la Faculte des Sciences de Dijon. Presente par le Dr. W. S. Bruce, . 35 



(Issued September 22, 1915.) 



III. On Larvse of Lingula and Pelagodiscus (Discinisca). By J. H. Ashworth, D.Sc, Lecturer in 



Invertebrate Zoology in the University of Edinburgh. (Plates IV and V), . . .45 



(Issued November 19, 1915.) 



IV. The Temperatures, Specific Gravities, and Salinities of the Weddell Sea and of the North and 



South Atlantic Ocean. By William S. Bruce, LL.D., Andrew King, F.I.C., and David 



W. Wilton, ........... 71 



(Issued November 29, 1915.) 



V. A Contribution to the Craniology of the People of Scotland. Part II. Prehistoric, Descrip- 

 tive and Ethnographical. By Principal Sir William Turner, K.C.B., D.C.L., F.R.S., 

 F.Soc. Ant. Scot., Emeritus Professor of Anatomy, ...... 171 



(Issued November 30, 1915.) 



VI. The Morphology and Development of the Free- Swimming Sporosacs of the Hydroid Genus 

 Dicoryne (including Heterocordtjle). By J. H. Ashworth, D.Sc, University of Edinburgh, and 

 James Ritchie, M.A., D.Sc, Royal Scottish Museum, Edinburgh. (Plates VI-VIII), . 257 



(Issued December 10, 1915.) 



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