374 Professor Sedgwick and Mr. Murchison on the 



from tertiary formations, there is not one quite identical with any of these 

 specimens ; and the forms, elsewhere very abundant in such formations, are 

 not met with at all at H'aring. For example, I have never seen among the 

 plants from this place any of the lobed leaves analogous to those of the Maple, 

 which are so common in the brown coal of Frankfort and other places*." 



Mixed with the plants are some casts of small bivalves, especially of the 

 genus Cyclas. Where the stinkstone is compact, the shells are generally rare : 

 it was however in one of the most compact layers that we found the Auricu- 

 laria simulaLa (?) of the London clay, a small Rostellaria, and several minute 

 Ostreas. In the lower marly laminse land shells begin to appear; and a tor- 

 toise, measuring six inches by three and a half, is stated to have been found 

 in this part of the series. 



9. Coal beds. — In the upper part of these beds fetid marlstone and marl alternate with imper. 

 fectly formed coal, containing numerous land shells. They are usually flattened and of a spiral 

 shape, and were at one time mistaken for Ammonites. These shells are now referred to the genus 

 Caracolla, and are of two species f. All traces of shells and plants gradually disappear, and the 

 coal passes into a nearly compact mass, of which there are several varieties distinguished by the 

 miners as follows. 



a. Pech.kohle — colour velvet black, and with little bitumen. 



I>. Schiefer.kohle — slaty coal. 



c. Schiippen.kohle — a variety resembling Cannel coal. 



d. Glanz-kohle — a sort of coke or anthracite, the bitumen having probably been driven oflf at 

 the period of combustion when the porcelain earth was produced. 



Iron and copper pyrites pervade the upper part of the coal ; the latter 

 mineral occasionally giving a metalloid lustre to the flattened land shells. The 

 total thickness of the coal beds pierced by this gallery is thirty-four feet ; of 

 which more than two-thirds is of good quality, and is largely extracted for the 

 use of the salt-works at Halle near Inspruck. 



We have before stated, that the coal increases in thickness on the line 

 of dip, and that by boring below the present works, nearly to the level of 

 the river Inn, it has been proved to be fifty feet thick. The mineral is 

 worked on the strike of the beds, which is from N.E. to S.W. ; and the dip 

 where the Barbara-Stollen cuts the coal is nearly at its maximum, about 36°. 

 The thickness of the fetid beds overlying the coal is considerable, but it is 

 omitted by Fliirl, and we had no means of ascertaining it with precision. 



* The plants above described will be figured in a future Number of M. Adolphe Brongniart's 

 Ilistoire des Vegetaux fossiles.^'' 



f Dr. Buckland has favoured us with a series of specimens collected by himself at Hiring in 

 the year 1820. Among them are the following fossils. Caracolla; Cerithium (?) ; Cyclas (?); 

 Paludina(?) ; Rostellaria, near to R. Pes Pelicani; Crenatula or Perna. 



