ERKATA ET CORRIGENDA. 



At p. 30, line 22, for substnces read substances. 



45, line 23, for post-liassic read prce-Liassic ? 

 line 30, for Guibon read Guybon. 



46, last line, for Ketospondylian read Tretospondylian. 

 59, line 2, for carbonarius read anghcus. 



124, figure, the bracket of tbe " Laminated series" should include only 



beds 2-4. 

 205, line 5, and 210, line 8 from bottom, for Plate XV. read Plate XVI. 



