CONTENTS. XIX 



On the existence of an Osseous Structure in the Vertebral Column 

 of Cartilaginous Fish. By James Stark, il.D., . . 463 



Farther Observations on Glaciers. By Professor Forbes, . 465 



The President announced that the Keith Prize had been awarded 

 to Professor Forbes for his papers on Glaciers, . . 465 



On the Development, Structure, and Economy of the Acephalo- 

 cysts of Authors ; with an account of the Natural Analogies of 

 Entozoa in general. By Harry D. S. Goodsir, Esq, Communi- 

 cated by John Goodsir, Esq., ..... 466 



Account of a Repetition of Dr Samuel Brown's processes for the 

 Conversion of Carbon into Silicon. By George Wilson, M.D. 

 Communicated by the Secretary, .... 468 



On Dr Matthew Stewart's General Theorems. By T. S. Davies, 

 Esq., ........ 471 



Inquiry into the Aborigines of the British Islands. Part II. On 

 the claims of the Cymric and Gaelic races to be thus considered. 

 By Dr S. Hibbert Ware, . . . . .471 



On the Knowledge of distance given by Binocular Vision. By Sir 

 David Brewster, K.H., ...... 475 



On the Geology of Cockbum Law, and its neighbourhood. By 

 William Stevenson, Dunse. Communicated by David Milne, 

 Esq., 475 



Notice regarding the Indian Grass Oil or Oil of Andropogon Cala- 

 mus- Aromaticus. By Thomas G. Tilley, Phil. D. Communicated 

 by Dr Christison, ••.... 478 



