ADVERTISEMENT. 



The present is the concluding volume of the Biblioqraphia 

 Zoologize et Geologise. The delay in its appearance has 

 been caused by the melancholy death of Mr. H. E. Strickland, 

 through whose unremitting care and labour the work had been 

 successfully edited and printed as far as the middle of this 

 volume. The Council of the Ray Society have been only 

 now able to present it to their members by the kindness of 

 Sir William Jardine, Bart., through whose assiduity the work 

 is now complete which his son-in-law commenced. 



It is however obvious that, on account of the time which has 

 elapsed since the publication of the first volume of this work, 

 many later works have been omitted. The Council of the 

 Ray Society therefore contemplate publishing a Supplement, 

 which will include the titles of all works which shall have 

 appeare4 subsequent to the publication of the previous volumes. 

 To render this as complete as possible, all Zoologists and Geolo- 

 gists are earnestly requested to forward a List of their Works, 

 or a Note of any Additions or Corrections to those which have 

 been already printed in the published volumes of the Biblio- 

 graphia, without any delay, to Sir W. Jardine, Bart., Jardine 

 Hall, Lockerby, N. B. 



It has also been determined to issue with the Supplementary 

 Volume an Index of subjects, which it is hoped will greatly 

 facilitate the use of the work and enhance its value to all 

 interested in the literature of Geology and Zoology. 



1 Dee. 1854. 



