[egleson] some CANADIAN MICAS S 9 



ly. {R,0), {RO),, (R,0,\ (SIO,),, or 



b 11 6 " " 



V. (R.^0), (RO),, (BM, (SiO,),, or 



8 12 6 '■ ■ 



50 



Vr. (R.O), (EG), (RM2 (SiO,), or 

 B'R['JirSi,0,, 



The phlogopite from Portland Township (No. V) is very similar in 

 composition to that from Burgess, Ontario, examined Ijy Clarke & 

 Schneider, except in containing a much smaller proportion of fluorine. 

 The Monmouth Lepidomelane, again, resembles in its composition those 

 occurring in the nepheline syenites of a nmnber o.f other localities, in- 

 cluding Liteihfield in Maine and Miask in Norway. 



