-2- 



that in order to make the bibliographical material 

 contained in the 25 vo liâmes more useful than 

 formerly and (to emphasize) that usefulness by- 

 arranging it so that the Zoological .^zeiger 

 follows along the line of the Bibliotheca Zoologica 

 (for the years 1846 - 1860) by Prof. J. V. Carus 

 in collaboration with 'Wilhelm Engelmann, as vvell 

 as its continuation publisheô. by Prof. 0. 

 Tashenberg for the years 1861 - 1880 and up to 

 and including 1902. 



It must be emphasized that the nomenclature 

 follov/s as far as possible the work of Leunis 

 Ludv/ig "Synopsis der Thi erkunde" and that the 

 author as well as the publisher have done every- 

 thing to make the Register serve the purpose as 

 v/ell as possible and to secure its absolute 

 accuracy. Above all v/e have given our most 

 particular attention to the references in the 

 earlier volumes (I s 19; II » 20); also the some- 

 what numerous errors in titles and citations 

 which unfortîinately crept in have this time been 

 set right in as far as possible by making a 

 careful search of the sources where they occurred. 



