62 Colonel Silvertop on the Lacustrine Basins 



tion of their whole surface will, no doubt, bring to light many 

 new and interestinoj facts. 



Mr Sowerby had the goodness to name the following 

 sliells : — 



Basin of Baza. 



Paludinae in superior compact limestone. Cypris in gypsiferous marl. 



Basin of Alhama. 



1 . Planorbis rotundatus. 2. Planorbis rotundatus vel planulatus. 3. Plan- 

 orbis nova species anfractibus numerosis compressis. 4. Bulimus pu- 

 sillus of Brard ; Paludina pusilla of Deshayes. 5. Paludina Desma- 

 restii. 6. Paludina pyramidalis. 7- Ancylus. 8. Cypris. 9. UnknoAvn 

 univalve. Bulimus decollatus ? 10. Lymnea. Tliese are found in the 

 compact and superior shelly limestone beds. 11. Pecten reconditus ? 

 like that at Hordwell and in London clay. 12. Fragments of Corals 

 and spines of Echini. These are found in the marine bed, composed 

 of alternating strata of calcareous sandstone and coral limestone, 

 which rest upon secondary nummulite limestone. 



Basin of Teruel. 

 1. Planorbis rotundatus. 2. Lymnea pyramidalis. 



Vestiges of Tertiary and Lacustrine Beds, in the South and 

 other Parts of Spain, 



1. In the neighbourhood of a village called Partaloba, about 

 eight miles distant from the transition limestone mountains of 

 Oria, which partially bound, towards the east, the basin of 

 Baza, a compact vesicular limestone, of a whitish-grey colour, 

 and containing a few shells which appear to be of fresh-water 

 origin, is quarried. It is in thick strata, and forms an excellent 

 building stone. 



2. Near Montesa*, on the road from Almanzaf to Valencia, 

 a low hill has been cut through, composed of thin fissil strata 

 of a limestone identical in colour and fracture to the compact 

 paludina limestone near Alhama, and containing numerous 

 moulds and casts of lymnese and paludinae. 



3. On leaving Albacete, a town on the royal road from Va- 

 lencia to Madrid, for the capital of Spain, a continued ascent 

 of several miles, where no rock comes to day, leads to a high 



• Montesa gives its name to one of the four military orders of Spain, 

 f Almanza, celebrated for the battle won by the Duke of Berwick, in fa- 

 vour of Philip, during the Spanish War of Succession. 



