26 Transactions. 



distinct, and were sent to Mr Greg for examination, who at 

 once pronounced them to be allanite, and the mineral is now 

 recognised as a British one in Greg & Lettsom's late work on 

 British mineralogy. Gadolonite is rarely found well crys- 

 talized ; what we found at Newabbey not at all so, and the 

 quantity was too small for analysis. The only other locality 

 in the United Kingdom — if this should prove to be one 

 — where the mineral has been found is in the county of 

 Galway, where a single specimen was got of small size. 



I may mention I lately carefully examined the large 

 granite quarrie near Creetown — this is not syenite — but 

 could find no trace of the minerals above referred to in it. 



In some places owing to the greater abundance of horn- 

 blend the syenite is much darker in colour than in others : 

 it is owing to the presence of this mineral that the stone 

 obtained from the recently opened quariy at Kirkconnel is 

 darker than that of the Dalbeattie quarries ; it also contains 

 a larger proportion of mica than the latter rock and is much 

 richer in spbene crystals. 



Sphene — 



Titanic acid, 41.33 



Lime, 28.22 



Silica, 30.45 



100 

 Chemical Formula — 



Ca Si + t! Si. 

 Allanite — 



Contains about 20 per cent, of oxide of cerium. 

 Chemical Foiinula — 



R Si + R Si. 



R being Ca, Ce, Fe, and R (alumina) Al. 



