M. Desnoyevs on the Chalk of the Cotentin. 

 2. Qiutrry named the Fosse dc la Bonne Ville. 



257 



Calcaire ! 



r 4 



Chalk. 



1. Vegetable soil. 



2. Greenish clay, or bad fullers-earth ; of consi- 



derable thickness in the vicinity. 



3. Very hard nodules of greenish limestone con- 



taining millionites, and of concretionary lime- 

 stone ; 1 to 2 feet. 



Compact limestone, mixed with small quartzose 

 pebbles, constituting a single very hard hori- 

 zontal bed, a kind of pavement for more than 

 600 paces. Cranice, Ammonites, Bactdites, &c.; 

 2\ feet to 3 feet. 



Less coherent limestone, and more gravelly, with 

 the same shells. 



Calcaire] 

 grossierJS 



r4. 



Chalk. I ^ 



3. Quarries at Orglandes. 



Vegetable soil. 

 Traces of brown clay. 



Pisolitic concretionary limestone, with impres- 

 sions of Calcaire grassier shells. [Cerithium 

 Cornucopia, Hij)ponyx, Clypeaster, &c.) 



Gravelly limestone bed, with chalk fossils and 

 small sandstone pebbles ; 2 feet. 



A very irregular mass or bed, compact, subla- 

 mellar, or mixed with silex; 3 to 4 feet worked. 



Organic remains of the Baculife limestone, found for the most 

 part at Orglandes, Frcville, Golleville, Nehou, and preserved 

 in the collections of MM. de Gerville, Defrance, and C. Pre- 

 vost, and in my own cabinet. Far from jn-etending to present 

 a complete enumeration of the species in this rock, I shall 

 only notice those incontestably found with the Baculites in the 

 compact limestone and subordinate marls*. 



Shells. Other Localities. 



Nautilus (2 species at least) 



pin the upper white chalk 



L 



I 



Bclemnites mucronattis . . Schlott <{ 



at Meudon, Bougival, 

 and Mantes near Paris ; 

 marly chalk of Ilseburg 

 in Prussia ? 



* I have been obliged, froni the necessary length to whicii these com- 

 munications must be confined, to omit many useful observations which ac- 

 com[)any the names of most of the species, and to form the table upon a 

 somewhat altereii \)\:in. - Trans. 



New Series. Vol.2. No, 10. 0(7. 1827. 2 L Ba- 



