EUROPEAN LOWER LIAS ZONES. 



65 



and 50. A few specimens of JEchmodus were found in the marls above the Belemnite- 

 beds at Golden Cap, but few remains are known in other beds of the Middle Lias. 



A Table showing the extension of the Lower Lias in the British Islands, Belgium, France, 

 Switzerland, Germany, Austria, and Ltaly, with indications of the Sinemurian Am- 

 monite Zones , found in some typical regions of the European area. 



Ammonite Zones 



of the 



Lower Lias. 



British Islands. 



5 



France. 





Gekmany. 





1— 1 



13 



33 



To 



C 





-a 



a 



OS 



o 



3 



i 



X 



3 



5 

 i 



o 



S3 



o 



03 

 3 

 1-5 



i35 



u 



> 

 o 

 a 



03 



W 







C 

 03 



S 



RARICOSTATUS 



* 

 * 

 * 

 * 

 * 

 * 

 * 



» 



* 

 * 

 * 



* 



* 

 * 



* 



* 

 * 

 * 

 * 

 * 

 * 

 * 



* 



* 

 * 

 * 

 * 

 * 

 * 



* 

 * 

 * 

 * 



* 

 * 

 * 

 * 

 * 

 * 

 * 



* 

 * 



* 

 * 

 * 

 * 



« 



* 



* 

 « 

 * 



* 



* 

 * 

 * 

 * 

 * 



* 



* 



* 

 » 



* 



* 

 * 

 * 

 * 



OXYNOTUS 



OBTUSUS 



TURNERl 



BUCKLANDI 



ANGULATUM 



PLANORBIS 





AVICULA CONTORTA 



* 



* 





* 



* 



* 



* 



« 



* 



* 



* 











My learned friend, Professor Edward Suess, of Vienna, whose valuable and sug- 

 gestive memoir " Uber die Ammoniten "^ formed the basis of the new generic classification 

 of Ammonites, writes to me, " we have now discovered a number of Ammonite horizons 

 only a few inches in thickness, as for example the Aeg. jjlanorbis 18 inches, Aeg. 

 angulatum 20 — 36 inches, upon thousands of feet of Rh<etic deposits in the midst of our 

 Alps. This contiguity of single horizons surely gives the Jurassic formation, or at least 

 a part of it, a character rather different from other European deposits, and well worth the 

 exact analogies which you offer." 



1 ' Sitzungsber. d. k. Akad. d. Wissensch.,' Bd. lii, Sitzung vom 30 Juin, 1865. 



