PREFACE, vii 



With very few exceptions, all the illustrations have been 

 drawn expressly for this work, with great care and fidelity, 

 by Mr. R. W. Sherwin, from specimens in the Museum of 

 the Royal College of Surgeons. 



September 2\lh, 1 8 70. 



NOTE TO SECOND EDITION. 



This edition has been revised throughout, and a new 

 diagram of the arrangement of the principal bones of the 

 skull introduced in place of the table at p. 104 of the 

 former edition. 



I have to thank many friends for pointing out errors 

 and omissions, most of which, it is hoped, have now been 

 corrected. 



May 22nd, 1876. 



