40 Professor Bronn on some Geological and Physical 



The observations made as to the remains of extinct animals 

 occurring along with remains of man in original repositories, 

 can hardly be said either to be confirmed or contradicted. 



II. For a long time it appeared that there existed a very 

 marked limit between the molasse and cretaceous periods, es- 

 pecially as there was to be seen near Paris a rich and per- 

 fect series of strata at the boundary of the two, where they 

 seemed to be very distinctly separated in their deposition. 

 On the other hand, Grateloup persists in the assertion that at 

 Dax, some chalk fossils occur above the chalk in the tertiary 

 strata, and he names in particular Spatangus ornatus, Defr., 

 Galerites excentricuSj Lamk., and Galerites semiglohus^ Lamk.,* 

 although Des Moulinst only enumerates the first in the two 

 formations. The sandstone of Gosau has yielded, besides ter- 

 tiary fossils, Fecten quinquecostatus and Trigonia scabra, and, 

 according to Sedgwick and Murchison, also ten other chalk 

 species. Lyell instances such mixtures in the Faxoe lime- 

 stone on Faxoe. The green sand at Aix la Chapelle con- 

 tains, according to Dumont's list, seven tertiary fossils out of 

 twenty-eight species determined ; according to Davreux, five 

 out of thirty ; and according to Hoeninghaus, five out of twenty- 

 eight, which D'Archiac has already included in his list. In 

 the Crimea, according to Dubois, many fossil species of the 

 older tertiary strata extend into the chalk, and that chiefly in 

 a nummulite limestone and a hard marl. The same pheno- 

 menon is repeated in Egypt, where two characteristic species 

 of the oldest beds of the Calcaire grossier {Neritina perversa, 

 and the mould of a large Cerithium) occur in the chalk, while 

 certain Exogyrce and a Baculite extend into the same nummu- 

 lite limestone which was mentioned as containing so many 

 tertiary fossils in the Crimea. We borrow this information 

 from de Verneuil's memoir on the Crimea. 



III. The boundary between the chalk and the oolite series 

 has been very much effaced by the discovery and separation 



* Grateloup's AUmoire sur les Our sins fossiles, p. 3. 

 t Des MoulinS; Elude? sur les Eehinides^ p, 343, 393. 



