CONTENTS — (continued ). 



December 12, 1895. 



PAGE 



I. On the Determination of the Indices of Refraction of various Substances 

 for the Electric Ray. I. Index of Refraction of Sulphur. By Professor 

 J. C. Bose, B.A. (Cantab.), B.Sc. (Lond.) 160 



II. Researches on the Structure, Organisation, and Classification of the Fossil 

 Reptilia. Part X. On the complete Skeleton of an Anomodont 

 Reptile (Aristodesmus Miitimeyeri, Wiedersheim) , from the Bunter 

 Sandstone of Reihen, near Basel, giving new Evidence of the Relation 

 of the Anomodontia to the Monotremata. By H. G-. Seeley, F.R.S. . 167 



II. Octonions. By Alex. McAtjlat, Lecturer in Mathematics and Physics, 



University of Tasmania 169 



IV. On the Formation and Structure of Dental Enamel. By J. Leon 



Williams, D.D.S., L.D.S 181 



V. The Healing of Incisions in Vegetable Tissues. By Samuel Gr. Shattoce. 182 



1st of Presents 183 



bituary Notice : — 



G-eorge Edward Dobson 



