246 
fine-grained sand-stone ; 2. four inches of clay, intermixed with 
lime ; 3. two feet two inches of a foliated marley clay, with traces of 
bitumen ; 4. one foot of a calcareous schist of a yellowish grey, inter- 
mixed with flakes of rather bituminous clay ; 5. eight feet of a fissil 
schist, partly calcareous, in thin plates, and alternating with beds of 
friable clay ; 6. twelve feet of a hard fawn-coloured lime-stone, 
formed in flags and in beds, possessing more or less thickness : but 
very thin in some parts, and having the divisions marked by fine 
traces of a brown matter, which yields a bituminous odour with heat. 
In this stone are found the fish, and with them shells, insects, some 
small amphibia, and the impressions of leaves. 
At Aix, in Provence, M. Faujas informs us, fossil fish are found, 
resembling, in their size and state of preservation, those of Yestena 
Nuova. This quarry is formed of, 1. a schistose marie, of many feet 
in thickness, which forms the roof; 2. a white calcareous stone, 
containing about one fourth of clay ; 3. a pretty hard calcareous bed ; 
4. a schistose marie, like that of the roof, containing crystals of selenite ; 
5. to this succeeds a fissile stone, a mixture of lime, clay, and bitumen, 
of a light yellowish grey colour, detaching in flakes, on which are 
discovered the remains and impressions of fish, which are in general 
well preserved, and are from six inches to even two feet in length. 
The extinct volcanoes of Beaulieu are about three leagues distant. 
At Montmartre the remains of fish are also found in a marley 
lime-stone, which is over the plaster quarry ; but the bed in which 
the fossil fish are found at Aix, is beneath the plaster stone. From 
Nanterre, near Paris, M. Faujas obtained a fossil fish, more than ten 
inches long, in solid lime-stone, taken from seventeen feet below the 
surface. This fish, he thinks, bears a near resemblance to Corypliena 
chrysurus, Lacepede. M. Faujas himself discovered, half way up the 
side of the mountain on which is built the castle of Rochesauve, and 
beneath more than twelve hundred feet of what he terms lava ot 
different kinds, surmounted by vast basaltic masses, a fine and light 
