HAUER TEGEL OF OLMUTZ. 15 



hood of Coimbra by the blackish and grey slate with Cardiola 

 interrupta, intimates that the disturbance of the rocks continued in 

 the Lower Silurian period, when that area was already elevated 

 above the sea. The stratigraphical relations of the coal-beds de- 

 scribed above also show that during their deposition the disturbance 

 of the strata ceased, and that the most westerly portion of the fourth 

 system must at that time have been a valley in connexion with the 

 sea, forming a narrow strait or an estuary, into which the fresh- 

 water drainage of the country was discharged. In this estuary the 

 beds of the second group of the Coal-series were deposited, certainly 

 before the formation of the conglomerate seen near Varziela, on the 

 east of the Yalle de Deao and near Sete Cazaes. This conglomerate 

 leans against the steeply inclined beds of the fourth system, which 

 formed the eastern side of this basin. This and other facts, especially 

 the unconformity of the stratification, lead the author to the opinion 

 — already expressed by Herr E. Schmitz — that the second group of 

 the Coal-series must be considered of Devonian age. 



The author then describes what he conceives to have been the 

 prevailing physical conditions of the period immediately succeeding 

 the formation of these Devonian strata, during which the first Coal- 

 group was deposited. He considers this group to represent the 

 Carboniferous formation (Hulla) for the following reasons : — The 

 thick mass of breccia separating it from the Devonian strata; its 

 occurrence in small basins ; the difference in the fossil Plants of the 

 two groups, and the difference in mineralogical characters. 



The manner in which the present relations of the several series 

 have been produced is then treated of, including the effect of 

 denudation in exposing the strata ; and the author concludes by 

 stating his belief that the coal-beds of Yallongo and those of S. Pedro 

 da Cova are of the same age. [H. M. J.] 



On the Neogene Plastic Clay (Tegel) of Olnvtz, Moravia. 



By Franz von Hatjer. 



[Proceed. Imp. Geol. Instit. Vienna, Dec. 16, 1862.] 



Mr. Waldrich found in this clay specimens of Phasianella Eich- 

 wdldi, Homes, Bulla Utricula, Brocchi, Ervilia pusilla, Phil., Venus 

 multilamella, Lam., smdLucina eocigua, Eichwald. All these species 

 are also met with in the Tertiary basin of Vienna, the first three near 

 Steinabrunn and Baden, the fourth at Gainfahrn, and the fifth at 

 Steinabrunn. The sands intercalated with this clay yielded, upon 

 washing, some few traces of Bryozoa, spines of Cidaridce, some 

 Nulliporce, and, more abundantly, some fine species of Cypridince. 

 Foraminifera are rather scarce, and only represented by some few 

 forms. Among these are predominant : — 



Asterigerina planorbis, D'Orb., in the Vienna basin, occurring near 



Nussdorf. 

 Polystomella crispa, D'Orb., near Nussdorf and Baden. 

 Rosalina Viennensis, If Orb. 



