Vol. 65.] PETROGRAPHY OF THE NEW RED SANDSTONE. 245 



suggested by Dr. Evans, in the New Red rocks there were sufficiently 

 numerous instances of tabular crystals growing on ilmenite, and 

 crystals showing very low pyramid-planes, to preclude the possibility 

 of the tabular crystals being due to cleavage only. 



In reply to Mr. Barrow, he remarked that the blue acicular 

 tourmaline was not confined to the lower divisions of the New Red 

 Sandstone, but was exceptionally abundant in the Lower Breccias 

 and Sandstones. Most of the garnet in these deposits appeared to 

 be a pale-pink variety of that mineral, such as was usually met with 

 in true contact-deposits. He could not definitely state that he had 

 recognized any garnets to which a pneumatolytic origin could be 

 assigned. 



With reference to the remarks made by the President, he said 

 that, while it was possible to derive most of the minerals and grains 

 from rocks known to occur in the West of England, it was impossible 

 to regard the staurolite as having come from that district. The 

 parent rock of this mineral certainly lay to the south of the 

 present coast-line of Devon, and, as contended in his earlier paper, 

 in the old land-area of Armorica. 



■Q. J. G. S. No. 259. 



