X INTRODUCTION. 



contain AntJiracotherium gresslyi (Meyer), common to the Headon 

 series of Hordwell 1 . These observations indicate that the terms 

 Pliocene, Miocene, and Eocene cannot be categorically defined, but 

 must merely be regarded as marking stages in geological evolution. 



The subvolcanic alluvium of Puy-de-D6me, from the number of 

 its extinct mammalian forms, is classed at the top of the Pliocene ; 

 but it is quite probable that it may really be transitional between 

 the Pliocene and Pleistocene. The ossiferous strata of the typical 

 Siwalik hills of India, the contemporary strata of Burma and China, 

 and part of the Siwaliks of the Punjab are referred to the Pliocene ; 

 while the lower Siwaliks of Sind and the Bugti hills may not impro- 

 bably be referred to the lower part of the same epoch, or may be 

 regarded as transitional between the Pliocene and Miocene. The 

 Narbadas of India are classed with the Pleistocene. 



TABLE OF EUROPEAN TERTIARY STRATA 2 . 



1. UPPER PLIOCENE. ( Alluvium of Puy-de-D6me. 



a. s Val d'Arno (in part). 

 [ Norwich Crag. 



b. (?) Bed Crag (Suffolk, &c.). 



2. LOWER PLIOCENE. f Montpellier and Casino (Tuscany). 



1 Coralline Crag (Suffolk). 



f Pikermi (Attica) and Mont Lebcron (Vaucluse). 

 b. { Baltavar (Hungary). 

 [ Concud (Spain). 



3. UPPER MIOCENE. f Eppelsheim (Hesse Darmstadt). 



\ (Eningen (Switzerland). 

 b. Georgensmiind (Wiirtemberg). 



4. MIDDLE MIOCENE, a. Vienna basin (in part). 



Eibiswald (Styria). 

 Kapfnach (Switzerland). 

 Steinheim (Bavaria). 

 Sansan and Simorre (Gers). 

 St. Gaudens (Haute-Garonne). 

 Grive St. Alban (Isere). 

 Chaux-de-Fonds (Switzerland). 



fMontabuzard. 

 Orleannais. 

 Monte Bamboli (Tuscany). 



5. LOWER MIOCENE. 



f Weissenau (near Mayence). 

 a. ! Haslach (near Ulm). 



( Hochheim (near Wiesbaden). 

 , / St. Gerand-le-Puy (Allier). 

 ' \Puyde-D6me. 



1 See Lydekker, Geol. Mag. dec. 3, vol. ii. February 1885. 



2 It has not been considered necessary to introduce the Pleistocene. 



