10 



TYPE AMMONITES— III 



Mar. 



A further upward extension is presented in the following Table 

 but it must be regarded as only provisional. 



TABLE I, ARGOVIAN CHRONOLOGY 

 Old terms Faunal Horizons Strata 



ii. 

 10. 



Martelli 



Biarmatum 



(Morley Davies 1916) 



Vertebrate 



(or cordatum) 



fg. Dichotomoceras 

 ^8. martelli group 

 7. Aspidoceras 



r b. Vertebriceras, ( 



see p. 16 < 



5. Golialhiceras ( v 



4. Korythoceras 

 and Peltocerates, 

 see p. 17 



3. Peltocerates, 

 P. arduennense 



Upper pre-cordalum 

 (Morley Davies 1916) 

 pre-cordatum (S.B. 1911) 

 scarburgense (S.B. 191 3) 



2. scarburgense 



Lower prc-cordatum 

 (Morley Davies 1916) 

 prc-cordatum, S.B. 1911 



1. Cardioceras 

 cardia = A. 

 cordatum, Sow. 

 Paratype, 

 see p. 15 



T3 

 I* 



O 



y. 



O 



o 

 u 



The White Course. 

 The Coral Beds. 



The Exogyra 



Beds. 

 The Shell Bed. 



Base of Shell Bed. 



Lower Calc. 

 Grit. 



Loch Stafrin 

 Beds. 



H. 15, Oolite 

 ferrugineuse 

 of Villers-sur-Mer, 

 Normandy (R.D.). 

 Oxford Clay, Hunts; 

 Cowley, Oxford. 

 Borings, Kent 

 (Dr. Kitchin). 



Oxf. Clay, 

 Studley, Oxon and 

 Brill, Bucks (A.M.D.). 

 Borings, Kent 

 (F.L.K.) ; 

 H. 6, Villers-sur- 

 Mer, (partly), 

 (R. Douville) ; 

 Jura Bernois (Loriol). 



Oxf. Clay. 

 Studley Brickyard ; 

 (Lydlinch, Sturminster 

 Newton, Dorset) ; 

 Wotton Station and 

 Quainton Road, 

 Bucks (Morley Davies); 

 Borings, Kent 

 (F.L.K.) ; 

 Jura Bernois (Loriol). 



