JUN ?3 1902 



EMENDATIONS 



OF 



AMMONITE NOMENCLATURE 



BY 

 S. S. BUCKMAN. 



It is now eighteen years since my " Monograph of Inferior 

 Oolite Ammonites " was commenced ; and fifteen years since the 

 first part was pubHshed. The knowledge gained during the progress 

 of the work has shewn how general, particularly among retrogressive 

 series of Ammonites, is the phenomenon of Homceomorphy ; and 

 therefore that external similarity is no test of specific identity. The 

 necessary result is a considerable revision in the specific nomen- 

 clature, partly carried out in the two Supplements published — a revision 

 based on a close study of suture and radial lines. But there are 

 many species not touched in these Supplements, and final publica- 

 tion may be unavoidably delayed. Meanwhile, I am constantly 

 receiving for identification specimens of these species, both from 

 this country and abroad : to them I cannot give the old names, and 

 can only append the new at risk of misconception. Therefore, to 

 help others as well as myself, I have deemed it advisable to publish 

 this informal list of the proposed revisions. 



