176 FRESH-WATER TERTIARIES OF MINARA. 



at Minara, it is cut up into isolated hills, rising 

 from two to three hundred feet above the plain, 



Hill of fresh-water tertiary opposite the Village of Minara, — a,a, marls with 

 PaludincB and Limneus adelina ; 6, pisolitic beds ; c, conglomerate forming a 

 hard cap. 



and consisting of marls capped by flat tables of 

 conglomerate or limestone. At the sides of the 

 valley, and near the entrances of ravines, the 

 conglomerate beds are very thick and extensive, 

 and the marls are deficient ; but towards the 

 centre the marls predominate, and often con- 

 tain nodules of menilite. In the limestone beds 

 imperfect casts of a Limneus, resembling L. longis- 

 catus, and of a Planorbis occur ; but the best- 

 preserved fossils are found in a few localities in 

 the marl, and consist of two remarkable shells, 

 a Limneus and a Paludina, the latter often oc- 

 curring in considerable numbers. The former 

 is a known but extinct species, which has been 

 described and figured by M. Cantraine in the 

 Brussels Transactions, under the name of Adelina 

 elegans. He received his specimen from Italy, 



