Geological Society. 47 



capped by keuper. A triple subdivision of the muschelkalk, established 

 by Huusmann, is spoken of, in which each subdivision is characterized 

 by its peculiar fossils. 



For a full account of the muscbelkalk of Wirtemberg the reader is 

 referred to Alberti's Konigsreich's Wurtemberg, by which it is shown, 

 that ail the salt-mines of that kingdom occur in this formation. The 

 Saurian remains found in it by M. Jager consist of Plesiosaurus, 

 Ichthyosaurus, and an unknown reptile, in addition to which Count 

 Miinster has procured from the same limestone, the jaws and teeth of 

 a crocodile, plates of a turtle, many parts of fishes of new genera, &c. 

 By way of comparison with the muschelkulk of Germany, the author 

 gives a sketch of the same formation in Lorraine, where the fine col- 

 lection of M. Gaillardot of Luneville is specially spoken of, in which, 

 in addition to many Sain-ian remains, there are bones of gigantic 

 tortoises, with the characteristic fossils of the formation (such as 

 Ammonites nodosus, A. hipUcahis, Mytilus socialis (Schlot.), Encrinites 

 liliformis), and two species of the remarkable fossil called Rhyncolites. 



Keuper. — This formation of purple, red and green sandstone and 

 marls is stated to be of enormous thickness at Stuttgart, where it is 

 seen reposing on muschelkulk, surmounted by lias; and a detailed 

 section at that place is given, in which are specified the beds of red 

 sandstone containing the greatest number of the fossil plants de- 

 scribed by M. Jager. Calamites are mentioned as being found in the 

 lower quarries, and in the upper certain Equisetaceous plants, which 

 very much approach to the characters of the plants of the lias and 

 oolitic series of England : 2 new species of Saurians, (Cylindricodon 

 and Cubicodon of Jager,) are also mentioned. The exact range of this 

 formation in ihe North of Germany is to be found in Hoffmann's 

 New Maps. 



The author believes that the upper red and green marls of the En- 

 glish series are the true representatives of the keuper, and that the 

 only group in the red sandstone series of Germany hitherto un- 

 observed in England, is the viuschelkalk ; and he invites geologists 

 to attempt to discover the equivalent (however feeble) of that lime- 

 stone formation, by seeking for it as a bed of separation between 

 the upper red marls and the lower new red sandstone of this island. 



Lias. — The lias marls and gryphite limestone, with many identical 

 species of English fossils, are stated to be well developed in Wirtem- 

 berg, the north of IJavaria, Hanover, Westphalia, &c. 



After instituting a close comparison between the fossil contents of 

 the lias of Wirtemberg and that of England, in Saurian and other ani- 

 mal remains, drawn chiefly from the work of M. Jager, the author gives 

 in great detail, a section on the right bank of the Maine at Banz, near 

 Coburg, a spot to which his attention was first directed by M. de Buch, 

 where the beds are very analogous in mineral characters and suc- 

 cession to those of the coast of Whitby, and where the most asto- 

 nishing profusion of fossils has been collected through the indus- 

 try of MM. Theodori and Gczer, ail of which now ornament the 

 Ducal museum of Banz. Amongst these are (i species of Ichthyo- 

 saurus, [> of which are known in England (^Iclithyosaurus tetiuiro.dris 



being 



