Hi PROCEEDIXGS OF THE GEOLOGICAL SOCIETY. [vol. Ixxiii, 



Elgin Trias. His petrographical work includes an interesting 

 study o£ the granites of the North of Scotland, and he has also 

 carried out a large series of chemical analyses of igneous and sedi- 

 mentary rocks in order to elucidate theoretical questions suggested 

 in the course of his researches. 



His recent discovery of plant-bearing cherts in the Old Red 

 Sandstone of Rhynie (Aberdeenshire), has added a new interest 

 to that formation. Dr. Kidston and Prof. Lang recognize these 

 cherts as silicitied layers of peat, and a new class of vascular 

 cryptogams, the Psilopliy tales, has been made for the reception of 

 the plants which they contain. 



I ask you, in forwarding this Award to Dr. Mackie, to convey to 

 him oui* hope that he will thereby be encouraged to continue the 

 researches which he has hitherto pursued with such enthusiasm. 



AWAEDS EEOM THE LyELL GEOLOGICAL FuND. 



The Peesideis^t then presented a moiety of the Balance of the 

 Proceeds of the L^^ell Geological Fund to Arthue Hubeet Cox, 

 Ph.D., and addressed him in the following words : — 



Dr. Cox,— 



Tlie Council has awarded to xom one moiety of the Proceeds of 

 the Lyell Fund in recognition of the value of your work among 

 the Lower Palaeozoic rocks. Since you read before this Societ}', 

 five years ago, a paper on the Pedwardine Inlier, you have devoted 

 much time to geological researches m Wales, both South and 

 North. Your paper on the Abereiddy and Abercastle district was 

 a valuable contribution to the stratigraphy and tectonics of Pem- 

 brokeshire, and gave evidence of skilful and accurate w^ork in the 

 field. On the petrological side, too, it added to our knowledge of 

 the Ordovician igneous rocks, a subject to which ^^ou have also 

 given attention elsewhere. Your work in the Cader Idris district, 

 of which we have as yet onl}" a preliminar}' account, seems to be 

 of the same thorough quality ; and, in thus marking our apprecia- 

 tion of what you have already done, Ave look forward to results not 

 less important from 3'our geological labours in the time to come. 



