ERRATUM. 



The explanations for the Plates 

 HI k TV are alternated. 



Palaeoxoic 



limestone. 



W////////''////-^ 



^ Ptilacmoic coiupacL^ 

 cf.uartzite. 



Palaeozoic sldte.. 



Palaeozoic somfslone. 



z 



ampliibolilc or pyrojcetiite. 



