THE GEOLOGICAIi STRTJCTURE OP SOUTH COBISTWAXL. 273 



Another similar region occurs in the Lizard district, where 

 the dip of the apparently older series of hornblende and talco- 

 micaceous slates become opposed to that of the ordinary strata 

 immediately south, and to the north of the Helford river, and 

 where their other relations are rather obscure, so that the 

 geology of this, (notwithstanding the late very able investigations 

 of Professor Bonney, who regards the Lizard rocks as of 

 Archeean age) as well as of other areas of Cornwall, presents 

 a very wide field for investigators. 



To conclude, let me acknowledge, amongst others, the very 

 correct and able conclusions of Mr. N. "Whitley,* who many 

 years ago expressed and recorded opinions very similar to some 

 of those held by myself, and whose views, let me add, I have 

 only had the pleasure of becoming acquainted with since the 

 completion of this paper. 



* See Annual Eeport of the Royal Geological Society of Cornwall, Vol. 

 VII, page 285, 1858. 



V 



