CONTENTS. Vll 



NUMBKR PAGE 



XVII. On the Placentation of Halicore Dugong. By Sir William 

 Turner, M.B., LL.D., D.C.L., F.RSS.L. and E., Professor 

 of Anatomy in the University of Edinburgh. (Plates L, II., 

 Ill), 641 



XVIII. Non-Alternate ± Knots, of Orders Eight and Nine. By C. N. 



Little, of Nebraska State University. (With a Plate), . 663 



PART III. (1887-89.) 



XIX. On the Development and Life- Histories of the Teleostean Food- 

 and other Fishes. By Professor W. C. M'Intosh, F.R.S., 

 and E. E. Prince, B.A., St Andrews Marine Laboratory. 

 (Plates I.-XX VIII.), 665 



PART IV. (1889-1890.) 



XX. On the Thermal Conductivity and Specific Heat of Manganese- 

 Steel. By A. Crichton Mitchell, B.Sc., . . . 947 



XXI. Strophanthus hispidus : its Natural History, Chemistry, and 

 Pharmacology. By Thomas R. Fraser, M.D., F.R.S., 

 F.R.S.E., F.R.C.P.E., Professor of Materia Medica in the 

 University of Edinburgh. Part I. Its Natural History and 

 Chemistry. (Plates I.-VIL), . . . .955 



XXII. On the Foundations of the Kinetic Theory of Gases. III. By 



Professor Tait, ...... 1029 



XXIII. On Systems of Solutions of Homogeneous and Central Equations 

 of the nth Degree and of two or more Variables ; with a Dis- 

 cussion of the Loci of such Equations. By the Hon. Lord 

 M'Laren. (Plates I. -VI.), .... 1043 



