Vol. 67.J PERMIAN TO THE TRIAS IN NOTTINGHAMSHIRE. 109 



Carboniferous (W. Hind, 1S97) and Permian, but is Permian 

 only according to Zittel; and the genus is barely separable from 

 Myophoria, which is so typical of the Trias (see Steinmann, 

 Waagen, 1 and Wohrmann a ). 



Prom what has been said above, it is evident that the genus of 

 Myalina hausmanni is quite uncertain, and its affinities are there- 

 fore also uncertain. However, a species occurs in the Middle 

 Bunter 3 of Germany, which is so like M. hausmanni that for a long 

 time it was mistaken for it. 



The scaphopod Dentalium is a persistent type, which still exists. 



Turning to the Gastropoda, we find that the genus of the Natica 

 is doubtful ; but, if the determination be correct, all the gastropoda 

 recorded belong to genera which are still living. 



The genus Palceoniscus is usually regarded as an important link 

 with the Palaeozoic, but the genus is exclusively Permian (A. S. 

 Woodward, 1898, p. 86). 



The plant Voltzia is typical of the Bunter, and is unknown in 

 the Carboniferous. 



Many of the fossils in the list are of restricted range, as, for 

 example, the Rhizopoda, which are recorded only from Dyer's Quarry 

 (Durham). The two species, Myalina hausmanni and Schizodus 

 obscurus, are by much the commonest fossils, and in South York- 

 shire and Nottinghamshire the only fossils that are found. Their 

 wide distribution enables us to correlate the Upper Magnesian Lime- 

 stone of England with the upper part of the German Zechstein, 

 although it is to be remembered that both species occur also in the 

 Lower Magnesian Limestone. 



The southernmost occurrence of the Zechstein in Germany is 

 near Heidelberg ; but in the Bavarian Palatinate, on the other 

 side of the Rhine, there occurs a dolomitic bank, in red chalky 

 beds and clayey sandstones, which were regarded as Bunter, until 

 Myalina hausmanni and Schizodus obscurus were found in them. 

 Here we have proof of a Bunter facies of the Upper Magnesian Lime- 

 stone, such as is claimed to occur at Nottingham. 



Mention has already been made of the presence of a shell closely 

 resembling M. hausmanni (Aucella of Geinitz) in the Bunter. 

 This occurs in the sandstone, north of Salza, north-west of Langen- 

 bogen (Ebert, loc. cit.). The fossil is of common occurrence, and is 

 accompanied by Gervillia murchisoni, the characteristic fossil of 

 the Middle Bunter. 



It seems, then, that the palseontological evidence is 

 not opposed to the idea that the Upper Magnesian 

 Limestone of England is contemporaneous with part 

 of the Bunter. 



1 W. Waagen, 1881, p. 241. 

 S. von Wohrmann, 1894, p. 2. 



Th. Ebert, 1889, p. 241. 



