yi CONTENTS. 



PART II. (1901-02.) 



NUMBER PAGE 



XII. Ice- Erosion in the Cuillin Hills, Skye. By Alfred Harker, M.A., 



F.G.S. (With a Map), ...... 221 



XIII. The General Form of the Involutive 1 — 1 QuaAric Transformation in 



a Plane. By Charles Tweedie, M.A., B.Sc., . . . 253 



XIV. Apparatus for Measuring Strain and Applying Stress : with an 



Account of some Experiments on the Behaviour of Iron and Steel 

 under Stress. By E. G. Coker, D.Sc. (With Eight Plates), . 263 



XV. On the Anatomy of a Collection of Slugs from N. W. Borneo ; with a 

 List of Species recorded from that Region. By Walter E. Collinge, 

 Lecturer on Zoology and Comparative Anatomy in the University of 

 Birmingham. (With Three Plates), . . . . .295 



XVI. The True Shape, Relations, and, Structure of the Alimentary Viscera 

 of the Porpoise (Phocoena communis), as displayed by the Formal 

 Method. By David Hepburn, M.D., F.R.S.E., and David Water- 

 ston,M.A., M.D., F.R.S.E. (With Three Plates), . . .313 



XVII. On the Primary Structure of certain Palceozoic Stems with the 

 Dadoxylon Type of Wood. By D. H. Scott, M.A., Ph.D., F.R.S. 

 (With Six Plates), . . . . . .331 



XVIII. On a Possible Stridulating Organ in the Mosquito. (Anopheles 

 maculipennis, Meig.) By A. E. Shipley, M.A., and Edwin Wilson, 

 F.E.S. (With a Plate), . . . . . .367 



XIX. The Early Derdopnv nt of Cnbrella oculata (Forbes), with Remarks on 

 Echinoderm Development. By Arthur T. Masterman, M.A., D.Sc, 

 F.RS.E. (With Five Plates), . . . . .373 



XX. A Bathymetrical and Geological Study of the Lakes of Snowdonia and 

 Eastern Carnarvonshire. By T. J. Jehu, M.B., B.Sc. (Edin.), M.A. 

 (Camb.), F.G.S. (With Eight Plates), . . . .419 



PART III. (1902-03.) 



XXI. The Meteorology of Edinburgh. Part III. By R. C. Mossman, 



F.RS.E., F.R.Met.Soc. (With a Plate), . . . .469 



XXII. Vanishing Aggregates of Secondary Minors of a Per symmetric 



Determinant. By Thos. Muik, LL.D., . . . .511 



