[ 134 ] 



XVII. On some new Forms of British Sphenes, 

 By Dr. Heddle*. 



THE following forms of sphene were found by Mr. Dudgeon 

 and myself in a glen about a mile west of New Abbey in 

 Kirkcudbriolitshire : — 



ync; yncr; yncx; yncxr; yncxw; yncxwz. 



120 30 

 141 36 

 114 21 

 66 58 

 yx 158 55 

 yz 154 13 

 ex 140 39 



yc 

 yn 

 yr 

 yv 



146 13 

 126 26 

 113 28 

 136 04 

 144 53 

 153 24 

 xw 172 16 



c r 

 c %■) 

 r r 

 nn 

 c n 

 nr 



WW 164 32 

 X z 164 49 

 z z 149 38 

 z w 172 32 

 z n 167 23 

 z r 140 47 



These crystals, which are imbedded in syenite, are associated 

 with minute crystals of Allanite of the form M T «, and small 

 specks of Gadolinite (?). 



The largest crystal of sphene found was but the third of an 

 inch in length ; at some places, however, they occur in such quan- 

 tity as to become quite a constituent of the rock, and to commu- 

 nicate f it their characteristic hair-brown colour. 



* Commumcatcd by the Author. 



