ERKATA. 



Page 15, line 18, for any read all. 



,, 17, ,, 18, for two slips read slips. 

 24, (fig. 7), for T read 3. 

 ,, 25, line 19, for hollow read hollows. 

 ,, 28, ,, 10, for prove read proves. 

 ,, 33, lines 22, 25, for moiitonnees read moutonnees. 

 ,, 70, line 7, for will then be read will have been. 

 71, for Top of Church Escarpment read Top of Chalk Escarp- 

 ment. 



,, 82, line 4, after transferred insert by parallel rule. 

 ,, 87, insert footnote :* Metals and Minerals, as constituents of 

 Rocks, are, for convenience sake, included under this. 

 . heading, Lithology. 

 ,, 94, line 6, omit its. 



,, 155, ,, 12, insert if between the words while and these. 

 ,, 156, ,, 4, for trelobites read trilobites. 

 5> for lingula flags read Lingula flags. 



