Freslb-water Formations of' Aid:, in Provence. 289 



F In. 

 1- The roof called " Les Caniards" — a mass of spear-shaped crystals 



of gypsum, in a matrix of pulverulent marl, . .20 



2. " La Noire" — dark green and white fine laminae of marl, with 



some vegetables and crystals of gypsum, . . .0 24 



3. " La Figuette" — fine foliaceous marl, with some gypsum, . 6 



4. " La Feuille" — compact bituminous marlstone, light green co- 



lour, . . . . . . . .02 



5. " La Feuille a Poisson," or Bed containing many Fish — a light 



brown finely laminated marl, with a polished upper surface, 

 contains also several plants, including the Flabellaria Lamano- 

 nis ? Ad. Brongniart, . . . , . 24 



C. " FeuiUe a Mouche," or Insect Bed. — This is a brown greenish, 

 or light grey calcareous marl, effervescing briskly with acids, 

 fetid under the hammer, very thinly laminated, and is the on- 

 ly bed in which insects have been found ; with these are, how- 

 ever, associated an occasional Potamides, and leaves of plants, 2 

 By the aid of the lens, it may be seen that there are some- 

 times more than seventy distinct laminae in the thickness 

 of an inch, being about as thick again as ordinary printincf 

 paper, often preserving a very uniform thickness, and 

 sometimes one of them is equal to from five to ten of the 

 others. Although the rock may be divided at almost any 

 of these laminae, it generally requires a sharp blow of the 

 hammer. An impression of the form, together with diffe- 

 rent parts of the insect, is seen both on the upper and un- 

 der laminae, as in the case of the Monte Bolca fishes. 

 7- " Feuille de Diablon" — more compact, and passing below into 



gypsum, . . . . . . . 24 



8. " Le Diablon" — first good bed of hard workable gypsum, thinly 

 laminated, of whitish brown colour, and containing an occa- 

 sional nodule of silex, . . . . .06 



0. " La Premiere Blanche" — best quality of saccharoid gypsum, co- 

 lour white and pink, with large stems and leaves of Flabellaria, 



&c. . . . . . . . . gi 



10. " La Seconde Blanche" — saccharoid gypsum, less white than the 



above, . . . . . . .08 



11. " La Prime"— differs little from 9. and 10. . . .05 



12. " La Rouge" — reddish tinge, contains amongst others leaves re- 



sembling those of Laurus dulcis, or cinnamon ? 

 13. " Les Queirons" — with occasional silex, v^etable stems, and 



minute plants, . . . . . . 74 



14. " La Soutanne" — gypsum becoming of bad quality, with an oc- 



casional Potamides, . . . , . 6j 



15. " La Tuf " — fetid coarse gypseous marl, forms the bottom, and 



rests upon, . . , . . . .06 



16. " Pierre Froide," or Dead Bed^ompact argillaceous marlstone. 



Total of Gypsum Gallery, 1 5 



