D GEOLOGICAL MEMOIRS. 



not confined to any definite horizon. It both overlies and underlies 

 the Aptian Orbitulite-beds, without any difference in its penolo- 

 gical or palseontological characters. 



The Eocene formations are as follows, in ascending order : — 



1. Pilatus-beds (Pilatan), 660 feet thick, divided into 



a. Complanata-he&s, consisting of limestones and green 

 sandstones, with peculiar faunas which mutually ex- 

 clude each other ; and 



6. Pectinite-shales. 



2. Kigi-beds (Bigian, Lower Flysch), 2660 feet thick, with local 

 intercalations of conglomerates and limestones (Lowerz limestones), 

 and with a rather rich fauna and flora, varying according to the 

 nature of the rock. 



3. Obwaldner-beds (Silvan, Upper Flysch), 2660 feet thick, con- 

 sisting of more compact rock, but poor in fossils. 



The author's investigations of the Molasse have led him to results 

 differing somewhat from those generally accepted, as will be seen 

 from the following Table : — 



Divisions. 



Marine Molasse. 



Freshwater Molasse. 



Upper Molasse, 

 300-600 metres. 



d 



QO 



ta.§ 



03 



3 



Berne 

 beds. 



Aargau 

 beds. 



e 



X 



03 



'o 



(0 



Napf 



beds. 



Allis 

 beds. 



St. Galle beds. 



Middle Molasse, 

 300-600 metres. 



di 

 oi 



Lucerne beds. 



Middle 



Freshwater Molasse. 



Hohe 



Rhonen 



beds. 



Aarwang 

 beds. 



Lower Molasse, 

 400-500 metres. 



6 



03 

 03 



Horwer beds. 



DO 



QQ 



03 



"o 



lJ 03 



M IS 



to 



Ov 



Red Molasse. 



[Count IT.] 



