Page:Quarterly Journal of the Geological Society of London, vol. 26.djvu/495

 Belemnites brunswicensis, Von Stromb.

Ammonites Deshayesi, Leym.

— Martini, D' Orb.

—, sp.

— ' sp * „

Crioceras? sp.

Ancyloceras gigas, Sow, sp. (A. Renauxianus, D' Orb.).

Panopaea neocomiensis, D' Orb.

Pinna Robinaldina, D' Orb.

Avicula, sp.

Terebratula Moutoniana, D' Orb.

Megerlia tamarindus, Sow. sp.

Rhynchonella antidichotoma, Buv. sp.

— Gibbsiana, Sow.

Terebratella Astieriana, D' Orb.

Holaster laevis, Ag.

? Hemiaster phrynus, Desor.

Species of Rostellaria, Pleurotomaria, Inoceramus, &c.

This fauna enables us to refer this bed with certainty to the Upper Neocomian.

The succession of beds described by M. Hosius * as occurring at Ochtrup, intermediate between Bentheim and Ahaus, enables us to bring into connexion the sandstones of the former place with the clays of the latter.

Under Gault clays, abounding with Belemnites minimus, List., we find :—

(1) Iron sandstone without fossils.

(2) Clays with septaria, and hard bands containing : —

Ancyloceras gigas, Sow. sp. (A. Renauxianus, D' Orb.).

— Matheronianus, D' Orb.

Ammonites Deshayesi, Leym.

— Martini, D' Orb.

Belemnites brunswicensis, Von Stromb.

These beds are evidently the same as those of Ahaus, i. e. Upper Neocomian, and on the same horizon as the " Cement-beds " of Speeton.

(3) Clays containing Belemnites jaculum, Phil., abundantly, and Bel. brunswicensis, Von. Stromb., rarely. These beds correspond with the upper part of the Middle Neocomian of Speeeton.

(4) Unfossiliferous clays.

(5) Sandstones, sometimes coarse and quartzose, and at other times ironshot. From these no fossils are recorded, but they are probably the same as those of Gildehaus. They lie directly upon

6) The " Walderthon."

Along the Teutoburger Wald, from Ibbenbuhren to Bielefeld, the beds of yellowish-brown sandstone, like those of Bentheim, and of considerable thickness, frequently form the highest point of the chain. These beds at times pass into limestones and ironstones and are associated with thick beds of blue clay. Everywhere they appear to be characterized by the abundance of large specimens of Pecten cinctus, Sow. The same strata occur similarly in the range of the Lippischer Wald, which forms a continuation of the Teutoburger Wald in a south-easterly direction, and in the chain of the Egge Gebirge, which from the former runs in a southerly direction from Detmold to near Warburg †.

From the Sandstones of the Teutoburger Wald the following fossils have been recorded, which clearly indicate their identity with the similar strata of Gildehaus and Losser, and that, like these, they are to be referred to the same horizon as the Tealby Limestones and the middle portion of the Speeton Clay.

(1860) p. 48.
 * Beitrage zur Geognosie Westphalens, Zeitschr. d. deutsch. geol. Gesell. xii.

† Vide Ferd. Romer, Leonh. und Bronn's Jahrb. 1845, p. 267 ; 1850, p. 385 ; 1852, p. 185 ; also Zeitschr. d. deutsch. geol. Gesell. vi. 1854, p. 99, &c.