i88 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



M. Gosselet* again divides the Devonian of the Franco-Belgian 

 region into Upper, Middle, and Lower, but with differences which 

 have palseontological value. 



His Upper Devonian contains the Psammites du Condros in 2 divi- 

 sions ; the Schistes de Famenne in 4 divisions. 



The Middle Devonian one large group (calcaire de Givet) divided 

 into 9 beds or bands. 



In the Lower Devonian Gosselet places (1) the schistes a Calceoles 

 (in 3 divisions), (2) Poudingue de Burnot, (3) the Grauwacke a 

 Leptama MurcMsoni (in 2 divisions), (4) the Couches de Gedinne and 

 conglomerates and schists (in 3 divisions). 



In the departments of the Loire Inferieur and Maine-et-Loire, 

 according to M. Caillinaud, the Lower Devonian occupies large areas 

 in the west of France ; and in the same departments M. Bureau 

 has determined the presence of the Upper Devonian. 



In Rhenish Prussia, in the Eifel district, the Devonian strata were 

 long studied by Ferd. Romer, of Breslau, and Dr. Emanuel Kayser. 

 They determined the following horizons and successions f : — 



6&S:»wfc)=ne::: } ^ D — • 



Striiiffocephalusrscbiat j 



Calceola-schist I Marl, Middle Devonian. 



Cultrijugatus-Stwfe (Spirifer) J 



Vichter schist \ 



Ahrian schist (Dumont) I Sandy schists, Lower Devonian. 



Coblentzian J 



F. A. Romer, of Clansthal, has correlated the parallel horizons or 

 deposits of the Harz and the Eifel. In the Eifel he gives 7 divisions, 

 in the Harz 8; they are compared with Aix-la-Chapelle and Couvin. 



In the ' Paheontographica ' (for 1854), F. A. Romer divides the 

 Devonian rocks of the Harz into 9 portions : — 



1. Arnay schists (jiingere Grauwacke), 



2. Cypridina-sch.\st. 



3. Goniatitc-schist. 



4. Iberg limestone. 



5. BeceptacuUtes-sckist. 



6. Stringocepkalus-limestone. 



7. Orthoceratite or Wissenbach schist. 



8. Calceola -schist. 



9. /Sjp?'n/era-sandstone (altere or Khenish Grauwacke). 

 Characteristic fossils are given with each, and the chief localities 



where the beds are exposed. 



The Fichtelgebirge, through the researches of Prof. C. W. GiimbelJ, 

 exhibit 4 divisions or groupings : — 



1. Cypridina-schist Upper Devonian (in 3 stages). 



± Calamopora-^ \ mMle DeV onian. 



3. Tentacidite-scmst J 



4. Nereite-schist Lower Devonian. 



* Annales des Mines, 6 e ser. torn. xii. p. 595. 

 t Zeitschrift d. deutschen geol. Gesell. Jahrg. 1871, p. 375. 

 + « Pala3ontographica,' Dunker and Meyer, xi. p. 109, " Ueber Clymemen m 

 den Uebergangsbilden des Fichtelgebirges." 



