lo GEOLOGICAL MEMOIRS. 



In the Spullers Alp there are beneath the preceding beds Schists 

 (No. 10) similar in external character to Flysch. These are marly 

 schists and sandstone, containing debris of plants, flakes of mica, 

 and impressions of Fuci, and have a thickness of 500 to 600 feet. 

 Without positively deciding the question of the age of this rock, 

 M. Escher places it in the lower Jurassic series, because it has not 

 yet afforded either the greenish sandstones * or the Helminthoids 

 which usually characterize the Flysch. Its Fucoids also have con- 

 siderable analogy to those of the Lias. 



The middle ju7'assicy No. 9, is represented by a whitish limestone 

 to the south of Vils. It contains 



Terebratula spinosa, Phill. Terebratula pala, Buck. 



T. concinna, Sow. T. antiplecta, Buck. 



The Upper Jurassic Limestone (Jurakalk von Au), No. 8, is met 

 with in the Bregenzer Wald, between Au and the Mellau Valley, 

 where it forms the anticlinal of Canisfluh. The fossils are few ; two 

 of the Ammonites are allied to A, biplex. 



The Cretaceous beds occur on the borders of the Alps between 

 the Rhine and the 111, and at the Griinten, near Sonthofen. They 

 resemble those of eastern Switzerland. The author mentions the 

 Etage Neocomien A, D'Orb. (1500 feet in thickness), with Toxaster 

 complanatus ; and the Etage Neocomien B, or Urgonien, of D'Orb., 

 = Schratten-kalk of Studer, or Caprotina-limestone. The latter is 

 whiter in colour than the former ; it contains 



Orbitoliua lenticularis, Bronn ; near Feldku'ch, the Griinten, &c. 



Caprotina ammonia, D'Orb. Griinten. 



Plicatula asperrima ?, D'Orb. Griinten. 



Janira atava, D' Orb. ; at Sentis. 



Ostrea. 



Nerinaea. 



Pentacrinites. 



The Greensand (Etage ^/6zew)=Turrilite-Sandstone, 100 feet 

 thick, has a variable lithological constitution. Fossils are abundant, 

 and are identical with those of Fis and the Perte du Rhone. 



Lastly, the Seewer-kalk, or the Inoceramus-limestone of Seewen 

 (200 feet thick), represents probably the Etage Cenomanien, E. Turo- 

 nien, and E. Senonien of D'Orbigny. 



M. Merian has found on the Liiner-gratt, between Prattigau and 

 the Liiner-see, a boulder full of fossils belonging to the Gosau forma- 

 tion (Etage Turonien). 



The Nummulitic formation, surmounted by the Flysch, occurs in 

 this region, and is separated from the upper Seewer-kalk by a marl 

 (100 feet thick) with Ostrea Archiaciana, D'Orb. This is the marl 

 which, according to Murchison ('Alps, Carpathians,' &c. pp. 186, 

 193, 201, &c.), presents a lithological passage from the Cretaceous 

 into the overlying Nummulitic rocks. 



The Molasse is divisible into two groups of freshwater formation, 

 separated by a marine deposit. Between Sibratsgfall and Bregeuz the 

 gravels of the Nagelfluh consist of limestones, and contain little or none 



* [We suppose that under this denomination the author refers to the Dioritic 

 sandstone known as the " Gres de Tavighanay." — Ed. B. U. Gen.] 



