Directions for placing the Plates :f the Twelfth Volume. 



Tab. 27. Labrus ornatus .... to face page 502 



28. Fossil Terebiatulce - - - - - -516 



29. Larus Sabini - - 522 



30. TracheiE of Anas spectabilis, mollissima and glacialis - 554 



The Binder is requested to observe, that as a general Title-page and a Table 

 of Contents for the whole Volume are now given, the Title-pages to the sepa- 

 rate Parts, and the Table of Contents for Part I., are to be cancelled. 



END OF TllJt: TWELFTH VOLUME. 





PRINTED BY RICHARD AND ARTHUR TAYLOR, SlIOI-LANE, LONDON. 



