NEW NAMES FOR NEW ROCK TYPES 



333 



The names proposed by the writers as appropriate for the four new rock 

 types may be tabulated as follows : 



In summary No. I (sodic syenite) is a canadare persalane, alkalicalcic 

 and dosodic, for which the rang and subrang names piedmontase and pied- 

 montose are proposed; No. II (gabbro-nelsonite) is a dofemane, polmitic 

 and perpyric, of the domiric rang and magnesiferrous subrang for which 

 the names roselandase and roselandose are suggested; Nos. Ill and IV (ilmen- 

 ite nelsonite and rutile nelsonite) are perfemanes of the same subclass, 

 order, and .\6ection, but differ in the rang and subrang positions. For the 

 order and section the names virginare and virginore, and the rang and sub- 

 rang of No. Ill the names nelsonase and nelsonose, and of No. IV virginase 

 and virginose, are proposed. 



