328 APPENDIX. 



The narrow limits of this Appendix precludes the writer from acknowledging 

 the sources from which all the information in the preparation of the work was 

 derived, but some of the principal memoirs laid under contribution are referred 

 to at the end of this Appendix. Where authorities are not in accord as to the 

 exact stratigraphical position of a formation — which is frequently the cvse — the 

 writer has adopted the views of that author who, in his opinion, is the most 

 competent to judge of the matter in dispute ; but in not a few instances he has 

 formed an independent judgment from personal investigation in various Tertiary 

 areas in Western and Southern Europe. 



It has been customary for many years for continental geologists to group series 

 of subdivisions which together form a particular facies, and to give to each of 

 these series a distinctive name. In England, in consequence of the restricted 

 development of Tertiary strata, we have never found it necessary to do more 

 than indicate whether such a series is Upper, Middle, or Lower Eocene, or other- 

 wise. For some reason not very clearly explained, the majority of the main 

 groups are here divided into three parts. If, perchance, four distinct facies 

 should present themselves within one of these groups, the fourth is merged into 

 one of the others, thus creating an unnatural classification. But the difficulties 

 attending this tripartite division are not so keenly felt in England as on the 

 Continent in areas where there is a more extended development of the beds ; 

 and many geologists on the other side of the Channel have naturally refused to 

 recognize such an arbitrary method of classification, and have endeavoured to 

 devise one which should more nearly represent the divisions in nature. In doing 

 80, some have undoubtedly over-classified the beds. Without always endorsing 

 particular views, we may now give certain schemes brought forward in different 

 countries. 



In the front rank stands the classification of M. Mayer-Eymar, of Zurich*, 

 which may thus be abridged : — 



Upper Tertiary or Neogene (Molasse). 



„ I II. Present epoch. 



' \ I. Achculon Post-pliocene diluTium. 2nd glacial epoch. 



(Saint Acheul, near Amiens.) 



II. Durntenin Post-pliocene. Inter-glacial epoch. Megat-eros 



Arnubian. • hibernicus. (Durnten, Canton of Zurieli.) 



I. Croraeron Pleistocene. 1st glacial ejjoeh. Elephas ineri- 



dionalis. (Cromer, Norfolk.) 



[■ II. Andoiiin Upper Pliocene. Red Crag. Yellow sub-Apen- 



AsTiAN. \ nine sand. (Audona, near Asti.) 



[ I. Tabbianon Lower riioccne. Blue siib-Apennine marl?. 



Coralline Crag(?). Black Crag of Antwerp (!'). 



I'aludma-heAa of Slavonia, &c. (Tabbiauo, 



near Parma.) 



* Meycr-Eymar, Classification des terrains tertiaires (1884); id. Tableau des Terr, 

 de sediment. 8 pp. (lithographed). 



