vi INTRODUCTION 



the definition of groups, in order to render the work more 

 acceptable to sportsmen than would be the case if less easily 

 appreciated features were given the first place. 



The opportunity may be taken of correcting the following 

 errors in the first volume : — 



P. 81, last hne, for B. S. Gilnther read R. T. GnntJier. 

 P. 102, hne 6 from bottom, for 2. 3. 9. 8. read 2. 3. 9. 6. 

 P. 129, bottom hne, p. 162, hne 16 from top, and Index, pp. 243, 

 244, for Orthagoceros read Orthsegoceros. 

 P. 160, hne 10 from top, for 50 read 55^. 

 p. 182, hne 4 from bottom, for 7}! read 11. 

 p. 184, hne 2 from bottom, for 2^^ read 2f . 



E. LYDEKKER. 



December 10th, 1913. 



