236 



in an ascending order the following succession of horizontal strata, 

 and may be taken as the type of the others. 



1. The nummulite limestone, which constitutes the boundary of part 

 of the basin. 



2. A coralline limestone, which in some parts alternates with a 

 calcareous sandstone and a fine-grained conglomerate ; the sandstone 

 abounds with a Pecten, which resembles the Pecten reconditus of the 

 London clay. 



3. The rock composed of alternate strata of gypsum and marl. 



4. The freshwater limestone with Paludina, above described, which 

 forms a table land, extending in the direction of Lojaas far as the eye 

 can reach. 



Under the freshwater limestone, near the village of Arenas, is a 

 large deposit of brown coal of unknown depth. The remains of Pla- 

 norbis are abundant in the upper layers of it. 



In conclusion, the author states that he had observed a compact 

 limestone containing Limnasa and Planorbis, near Partaloba, in the 

 province of Granada ; Montesa, in the province of Valencia and La 

 Gineta ; and Ocana, in the province of La Mancha ; — that he had like- 

 wise ascertained the existence of an extensive lacustrine basin near 

 the town of Terruel in the province of Arragon, composed of a coarse 

 limestone containing Limnaea pyramidalis (a fossil of the Isle of 

 Wight), resting upon gypsurn and marl. 



At the close of this Meeting, which terminated the Session, the So- 

 ciety adjourned till Wednesday Evening, the 3rd of November. 



Printed by Richard Taylor, 

 Red Lion Court, Fleet Street. 



