Von Koenen — Belgian Tertiaries. 



507 



species in the Systeme Scaldisien, near Antwerp, that does not occur 

 in the English Crag. There is, therefore, no reason to disbelieve 

 the geological and palseontological evidences, that the Systeme Dies- 

 tien is older than the Crag, and that the Systeme Scaldisien is the 

 exact equivalent of the Crag. 



If the Sable jaune (or Sable rouge) resembles more in its 

 fauna the Coralline Crag than the Eed Crag, to which it is referable, 

 by reason of its being the upper member of the Scaldisien, that 

 may be explained by the different condition and structure of the 

 Eed Crag, which was deposited, apparently, in a more agitated or 

 shallower sea. 



As to the Systeme Diestien I have explained my views before. 

 The scheme, therefore, is this : — 







England. 



Belgium. 



Germany. 



H 

 W 



o 

 o 



Eed Crag. 

 Coralline Crag. 



Systeme ( Sable jaune. 

 Scaldisien. \ Sable gris. 



' 



§ 

 o 

 o 





Systeme \ Sable uoir 

 Diestien and) and 

 Bolderien ) Iron-sands. 



Scbleswig. 



Dingden, Berssenbriick, 



Liinebarg, Giihlitz, etc. 









Elsloo, near Maestricbt. 



Cassel, Freden, Biinde, 



Crefeld. 



Sternberg, Wiepke. 



3 





Hempstead series 

 Bembridge series. 



Systfeme Rupelien. 

 Systeme Tongrien, super. 



Hermsdorf, SoUingen. 

 Stettin, Cassel, Biinde. 





O 

 1^ 



Headon series. 

 Brockenhurst, 



Systeme Tongrien, inf. 



Lattorf,'Westeregeln,XJrse- 

 berg, Helmstadt, Biinde. 



In conclusion, I may say it was most instructive to me to see 

 the different species distributed in the different places, and how 

 each had its peculiar locality. Thus, I remember a place where, in 

 the Sable noir, below the Pectunculus bed, there were large numbers 

 of bivalve Panopcea to be seen, though very difficult to be got out 

 entire. In another place, near the railway, I collected, at least, 

 fifty examples of Pecten Brummelii, Nyst., having a diameter of about 

 four inches, a species reputed very rare by Belgian geologists. It 

 is very unfortunate that the fortification-works are now finished. 

 Last year I could not find a single specimen worth picking up. Let 

 us hope that the fortress of Antwerp may soon become too small for 

 the requirements of Belgium, and that there will be new ditches 

 made around the city to yield future collectors additional examples 

 of these beautiful fossil shells and corals. 



